|Oddly although M$ provide a download source for Office 2007 and upwards... There doesn't appear to be one for earlier versions.|
If you have chum who has a copy of XP Office and it's the same version as yours, you can legally copy that disk and use it to install - using "your" key. You have to be sure that the version you have is the sam as your chum's.
i.e.If you have an OEM DVD then your key is OEM and it will only work with an OEM disk; similarly re' Retail versions. You cannot use an OEM key with retail and visa-versa.
Also there likely cheap copies (M$ legit disks) around at clearance houses, eBay and computer fairs.
message edited by trvlr