Converting from ME to 2000

I am now running ME on a AMD 1600, 1gb mem, 20/30 gb drives system and I am having many strange problems like programs terminating with KERNEL32.DLL errors, system freezes, memory leaks, etc. I own a copy of 2000 professional that I have not yet installed because I would like to avoid reinstalling all my applications. If I do an upgrade, will my problems likely follow me? I have an alternate partition allocated to use for the new OS.

Thanks,

Jack