Slipstreaming XP SP3 - Issues with Windows Vista

Don't slipstream XP sp3 on Windows Vista! - Bink.nu
Doh! Just found this out the hard way: If you try and create a slipstreamed Windows XP Service Pack 3 image (i386 directory for an ISO) on Vista it all looks like it works great until the machine you want to install boots into Windows - it won't accept a valid product ID. What a waste of time :-(

Back to the start, extracting Sp3 from the .exe (-x), extracting an i386 directory from my bootable ISO, and doing a update.exe /slipstream:c:\temp - this time from another XP machine...

Silly really to think that two Microsoft products would work well together.