I have the same problem. I installed nlite 1.4.7 and then I opened it and selected a directory with xp with sp2. I chose that I want to slipstream sp3 into it and that I want to make it unattended. It says it slipstreams sp3 successfully. Then I fill out the product key on the unattended page and a few other options. I apply the changes to the directory and then build the ISO. When I then use the ISO the installation stops and says "Invalid Product ID" and no matter what key I type in, it won't work. I know this problem was supposed to be fixed in this version but I think the bug might be lingering. Is there any debug info that anyone could suggest I post here to help get this resolved? Thanks!
