Xmerric

Hi all I have nearly done my first unattended xp disc but i have a problem installing an application using RunonceEx I have currently 5 installers the first 4 work with no problems, but on the 5th i get a error saying that the installer cant run because something is using it. (it is MSI installer) the command line is correct as i tried it on its own and it installs as it should. I have tried to make the first RunOnceEx run a batch file to add a second runOnceEx (hoping it would do it after a reboot) but it just loads the second RunOnceEx before it reboots. also i have tried adding an entry into RunOnce to load my second runonceEx after its rebooted then rebooting a second time but this dosnt work Is there anyway of making runOnceEx reboot in the middle of the installs? and continue were it left off. Thank in Advance Michael