Well, that does it. You can't install Step 7 Lite on anything but an XP machine. I need to put it on a Win 7 machine, so I'm stuck with professional. The other packages don't support STL, don't support S7-300 processors, or some other roadblock. I know the professional will work, so that's what I'll be getting.
Thanks to everyone for the input.
Thanks to everyone for the input.