Just thought I would share with the group.. I added support for the LSI U320 SCSI controller (Dell Precision) to my XP install. step 1: Add file SYMMPI.SY_ to i386. Compress the file SYMMPI.SYS from the driver disk. Step 2: Modify txtsetup.sif [sourceDisksNames] symmpi.sys = 1,,,,,,4_,4,1,,,1,4 [HardwareIdsDatabase] PCI\VEN_1000&DEV_0621 = "symmpi" PCI\VEN_1000&DEV_0622 = "symmpi" PCI\VEN_1000&DEV_0624 = "symmpi" PCI\VEN_1000&DEV_0030 = "symmpi" [sCSI.Load] symmpi = symmpi.sys,4 [sCSI] *CHANGE* symmpi = "LSI Logic PCI SCSI/FC MPI" Step 3: Modify dosnet.inf [FloppyFiles.2] d1,symmpi.sys [Files] d1,symmpi.sys Step 4: There is no step 4!