A while back I posted a question and Toolman Tim responded and got me started with slipstreaming sp2 onto an xp disk. Thanks Toolman. I started out playing around with autostreamer and googled on autostream and XP revealed a host of options. Found out I didn't need autostream and could easily do this manually. I used the "integrate" parameter to successfully slipstream sp2 into xp sp1. Works great. Having a bit of trouble understanding the boot image file but that's another issue. I then come across the update.exe parameter that purports to do the same. Haven't tried it yet. Does anyone know what the difference is?