txtsetup.sif in PRO1 is identical to txtsetup.sif in I386, except for the 'SetupSourcePath' line. Here are all references to cmdide.sys in it: [SourceDisksFiles] cmdide.sys = 1,,,,,,3_,4,1,,,1,4 [HardwareIdsDatabase] PCI\VEN_1095&DEV_0648 = "cmdide" PCI\VEN_1095&DEV_0649 = "cmdide" [BusExtenders.Load] cmdide = cmdide.sys [files.cmdide] cmdide.sys,4 pciidex.sys,4 [BusExtenders] cmdide = "CMD IDE Bus Driver",files.cmdide,cmdide And dosnet.inf in I386 contains these references to cmdide.sys: [FloppyFiles.1] d1,cmdide.sys [Files] d1,cmdide.sys Also, how do I know that my 'SetupSourcePath' is correct? What error would I get if PRO1 setup couldn't reach my I386 setup files?