>>>When I try to install this, it comes up with the a small window for a few seconds that says "Data" something, and now when I try to rerun it, it says that an instance is already running. There is some app called "Picture Package" listed, but it is not visible. What's up with all that? Does this not run on XP?
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>>AFAIK, SQL Server (server version) doesn't run on any OS which is not SERVER (Win 2003 Server, Win 2000 Server). You could install all tools from SQL Server like EM or QA but not server data engine. You must install MSDE on XP.
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>SQL 2000 Developer edition will install on XP. SQL 2000 Standard and SQL 2000 Enterprise will NOT install on XP IIRC.

I'm pretty sure I have installed 2000 Enterprise on XP.