MS-Office 2000, XP or 2003. Which one is more light-weighted for legacy hardware? [closed]

"MSO 2000 is easier on the system resources than XP/2003, although only by a small margin.

however, i'd choose 2003 over 2000 (Office XP is out of the question, 2003 is basically a major bugfix release) because of the Office Compatibility Pack, which enables MSO XP/2003 to handle MSO 2007 documents, which is not an option for MSO 2000."

I'm unsure about those three options, but if you only need Word you could try Abiword which is substantially lighter than MS Word and free as well.