FRED B

I can concur with this, and add some more details which may help zero in on the problem. I have also received the errors (there are multiple errors, but the basic one states that the CAB is not a cabinet file) when attempting to slipstream from XP with SP3. Specifically, the failure occurred for me on XP Professional with SP3 (x86) Retail. This is the ISO downloaded straight from Microsoft, so it's the latest, released, good copy. I used Daemon to load it into an emulated CD drive and copy the contents of the ISO (minus the autorun.inf) to a folder on my nLite workstation. I then started nLite (1.4.1 [OK, I hadn't updated in a while..] and 1.4.9.1, both fail identically BTW) and pointed it to the copied folder. The errors occurred immediately upon pointing to this folder; I did nothing else; proceeding only caused further errors and failures. Further Strangeness: XP Home SP3 x86 Retail did NOT produce errors, in fact nLite worked perfectly to slipstream drivers onto the installation, and the resulting ISO installed without error. The XP Home was also downloaded from Microsoft. Last wierdness: I downloaded XP Pro SP2 x86 Retail ISO from MS after the above downloads, and slipstreamed in SP3 as well as my target drivers etc, and this processed to an ISO without error; and the ISO installs OK (the target machine BSODs on install drivers in setup phase 2, but I suspect I have a wrong/bad driver, rather than some failure of nLite, since the CD installs XP and it comes up OK after the reboot). If you need to install XP Pro, I suggest using this latter technique until the problem can be resolved.