Hi FireGeier, Thanks for the reply and for the VU batch scripts, which are great (using them, I've just finished integrating hotfixes and it's done in minutes). It seems I didn't explain my problem well, sorry for that. My problem is: how do I make a partition mount in a folder during the Windows PE phase? I've gone through the Unattended setup guide and there seems to be no XML option for than, so I guess it all comes to running the following diskpart script somehow: SELECT DISK 0 CLEAN CREATE PARTITION PRIMARY SIZE=10240 FORMAT FS=NTFS LABEL="System" QUICK ASSIGN LETTER=C ACTIVE CREATE PARTITION PRIMARY SIZE=15360 FORMAT FS=NTFS LABEL="Programs" QUICK ASSIGN MOUNT="C:\Program Files" CREATE PARTITION PRIMARY SIZE=8192 FORMAT FS=NTFS LABEL="Temporary" QUICK ASSIGN MOUNT="C:\Windows\Temp" CREATE PARTITION PRIMARY FORMAT FS=NTFS LABEL="Documents" QUICK ASSIGN MOUNT="C:\Users" Can I use RunSynchronousCommand for that? Will it work? (I know I could set a different path (at least for \Users), but I want to preserve the default directory structure and only use mount points so that everything is transparent to user-space applications.)