Where to get (Old) Programs to download?

I’m trying to move programs, files, etc. from one PC Desktop to another (both are XP Home, SP3) for one of my clients, and I’ve only got a few programs left to try to install on the new PC. Since the old(er) PC has programs that are either discontinued or there’s a major update out, I’m having a hard time trying to find these versions of the programs. If someone could tell me where to get these, or if you know of a way to “copy” the program, it’s relative file(s) and registry entries over, that would be much appreciated! I have the keys for the programs that need one, so I would just need the software/program itself.
1) Microsoft Money 2005
2) Microsoft Plus! Photo Story 2 LE
3) Microsoft Works 8
4) Quicken 2005