SWM Merger is the tool where you can merge smaller *.swm files into a larger editable install.wim.

Step 1: Select the main SWM
Click the first browse button and select the *.swm file you wish to merge
Step 2: Select your 'Output' file
Select the location where you want your new install.wim to go.
Step 3: Press start
Press start and wait for it to finish

The 'Driver Installer' lets you install any driver either from driver packs or you just have an updated driver to the computer currently installed (Live).
Installing Drivers

Step 1: Select the folder your drivers are in
Use the 'Add Drivers' to select the folder which contains your drivers *.inf files
Note: *.inf files with the same MD5 will not be added, this avoids installing the same driver.
Step 2: Click Start
Once your files have been added, click 'Start' and W7T will start installing the drivers on your computer.
Step 3: Wait
Wait may take some time to install all the drivers, so go for coffee, cup of tea or whatever you prefer. W7T will let you know when it's done.
Uninstalling Drivers

Step 1: Press the scan button
This will check which drivers are already installed via on your live system.
Step 2: Select the drivers you want to remove
Tick the boxes next to the drivers your want to remove.
Step 3: Press 'Uninstall' and wait
Now all you have to do is sit back and wait for those obsolete drivers to be removed, W7T will update the list once completed.

XP and Vista users: You will need to use the DISM Installer in order for W7T to work on your Operating System!
Windows 7 Toolkit is a program designed to help you integrate your Updates, Drivers, Theme Packs, Tweaks, Wallpapers, Addons, SFX Installers, Gadgets and remove the things you don't want from your Windows 7 Image.
Tools Manager is the main window for Windows 7 Toolkit, there are many tools which you can select.
Main - Basic

All-In-One Integrator

This is the greatest tool in W7T, it's let you integrate, Addons, Remove Components, Drivers, Gadgets, Language Packs, Edit Services, Silent Installs, SFX, Theme Packs, Tweaks, Updates and Wallpapers!
ISO Maker

This is what it says on the tin, it creates your ISO file for you to burn! Now supports UEFI!
Windows 7 Toolkit Guides

A nice direct link to guides on how to use Windows 7 Toolkit
SoLoR SP1 Updates

SoLoR works very hard and providing ALL the updates released since Service Pack 1 so he should get credit for this, this little tool lets you easily download his updates which Microsoft has released via Windows Updates but more importantly which Microsoft has also released privately and which are not released via Windows Update.
Windows 7 SP1 ISO

Since i prefer my users to use the latest service packs, i have added a link to a completely free, legal and official download source to the Windows 7 SP1 DVD. Note, you will still need your own serial key.
Main - Intermediate

Unattended Creator

I'm sure you can guess what this is, this creates an Unattended file which you use to install Windows with, just create and make sure you place the new file in the DVD root.
USB Boot Prep

Prepares your USB stick so you can install Windows from it, obviously your computer needs to support USB booting!
WIM Manager

Manage and edit your install.wim, for example you can rename images, delete images, add new ones, create ISO, rebuild, mount, unmount, etc... You can also use this tool to integrate your unattended files.
Main - Advanced

All-In-One Disk Creator

This tool let's you combine all your WIM files into one DVD, this is most commonly used is to merge x86 and x64 disks.
Component Removal

This program let's you remove over 100 components which comes with Windows, some of them are Internet Explorer, IIS, Windows Media Player, Sample Pictures, Tablet PC components, etc... I am also planning on adding some more eventually.
WIM Registry Editor

This tool mounts the wim and then it's registry so you can add your tweaks into that image!
Tools

Converters
Language Pack Converter

Converts Langauge Packs which are in the exe format to cab so you can integrate them.
MSP Extractor (MS Office)

Converters Office Updates to msp so they can automatically install when you install Office.
MSU > CAB Converter

Converts MSU to CAB files so you can integrate them or install on your current OS via the CAB Installer.
Online Installers
Driver Installer

This will install drivers on your currently installed system using pnputil.exe, it will only install the drivers you need.This tool also lets you uninstall drivers too.
Update Installer

This will install updates on your currently installed system, probably mostly used by those who use SoLoR Updates. This tool also lets you uninstall old updates too.
Image Tools
SWM Merger

Merge *.swm files into a larger *.wim file so it can be edited.
WIM Splitter

This tool splits your install.wim into multiple files so you can fit them onto multiple CDs.
Capture Image

Captures new WIM images, so you can use that new image to install Windows.
Other Tools
Addon Maker

This tool is for advanced users to create .WA files which other users can use the All-In-One Tool to integrate into your image.
CAB Retriever

When Windows Update downloads updates, the cab files get left in a folder. This tool retrieves those files so you can integrate them.
Downloads

This has links to the most popular downloads you should need for W7T.

This tool lets you remove built-in Windows packages from your image, for example Windows Media Player, Windows Media Center or Internet Explorer. The difference between this and vLite is that this tool uninstalls them the official way rather than remove files the downside is that the image does not shrink as much as just removing the files. It also lets you remove old updates.
WARNING: Anything you remove using this tool can't be undone, it is permanent!

Step 1: When you first open up this tool you will be asked to select the image you wish to work with. Click 'Browse' and select the install.wim you wish to work with and then either click on the item Windows version you want and press select or just double click.

Once done, the image will start to mount and retrieve all available packages within the image, it will not show ones which have already been removed.
Note: You may notice that this list has more than the list available in 'All-In-One Integrator', this is because in the AIO i have only included the basics, whilst Component Remover will include everything, including updates.
Step 2: Select the items you want to remove
Once all the items have been listed, you can select the components you wish to remove.
Green: Safe to remove.
Yellow: Unknown, be careful removing these
Red:This will break something, something depends on this feature but it will hopefully say what it is.
Step 3: Begin
Once you have everything selected, you can now click 'Remove Components', once done it will rescan and shows you what's left in the image.
Step 4: Save
Once done, you can go ahead and close the tool, click 'Yes' and it will ask you if you want to save the image, i recommend you to 'Save & Rebuild', however if you are going to be working on more than one image then just rebuild once you're done with your last image.

This will let you have you Windows installed unattended. It's not the most complete unattended out there but it's better than nothing.

Luckily most of this is self-explanatory, note it is recommended to leave 'Architecture' set to 'AnyCPU' which means it should work for both x64 and x86 installs.
Main
This is where you select the most important parts of the unattended file, like your name, serial key, time zone, screen resolution, updates, Auto-Logon, etc...
Users
The 'Users' tab lets your add pre-installed usernames on the computer, with passwords, user group, description, again self-explanatory.
Editor (Advanced)
It is recommended to leave this alone unless you know what you're doing, since W7T does not have full unattended features it allows users to add their own entries and save them to a file, it also allows the user to see what will be saved.
Serial Keys
These serial keys are known as 'Default Keys', they are basically just used to make the install unattended by leave Windows de-activated and keeps the 30 day trial.
WARNING: If you use a Ultimate serial key then you must install Ultimate otherwise it will error.
Integration
You can use the 'WIM Manager' to integrate a unattended file.