I hear you. About 6 months ago I had an XP SP2 install and it just never worked. I rolled it back to SP1 and still didn’t work. I finally re imaged the laptop with SP2 and it worked perfect the first time. I’m sure we could all go on and on with install horror stories
I just don’t get it. It seems like they have a random error generator.
In any case, did you try adding Full Control to Everyone on the C:\\Windows\\Temp folder?
Otherwise, the Beta of Biztalk 2006 is available. It’s a much better installation process but you need VS 2005.