I don't see exactly what NET USE will do for me; it seems to be for network shares. What I want is the DISKPART command ASSIGN - Assign a drive letter or mount point to the selected volume. Here's my partition table (note, there is a 9.542 GB space between end of extended and start of next; that was an error on my part, and I don't know if PartitionMagic can safely make it larger) Partition ### Type Size Offset ------------- ---------------- ------- ------- Partition 1 Primary 23 GB 32 KB (C:) Partition 2 Extended 149 GB 23 GB Partition 3 Logical 9 GB 23 GB (U:) (mount to c:\docs&settings) Partition 4 Logical 47 GB 33 GB (P:) (mount to c:\Program Files) Partition 5 Logical 93 GB 79 GB (D:) (mydocs, deal with it later) Partition 6 Unknown 1028 MB 182 GB (Linux Swap) Partition 7 Unknown 50 GB 183 GB (Linux reiserfs) Oh yeah, all I'd consider formatting would be U:. Who thought of "documents and settings" and "program files"? that takes too long to type! Why not just "Users" and "Programs"? Well, at least "Docume~1" and "Progra~1" work. I really do prefer the \home, \usr, \opt, etc... that Unix/Linux/BSD uses. My thinking is that it'll be easier to mount the folders at the start and leave drive letters how they are, rather than having to move the CD drive to F. What this will do is move the specific folders to their own partitions in a way that is transparent to the install. Later, I'll do the actual registry settings so I don't get "access denied" messages when dealing in the start menu due to the Recycle Bin's complete ignorance of mountings. I'm just wondering, if I put a call to diskpart in the preinstall.cmd, will I be able to set up the mountings and then resume the install and have the mounting remain? Also, what would I need to do to enable the use of diskpart at that stage? PS: Wow, while I was busy mucking around editing this post someone else responded. I'm slow!