Hmmm. Thing is, Office 2003 does everything I can think I'd ever need, and lots more. I have problems with it trying to second-guess me when I'm formatting a page - it always gets it totally wrong.
Office 2007 has vastly more stuff - all those ribbon things, and menus that change every time you look at them. It drove me to distraction within minutes. I could install the 03 toolbar, but then why bother with 07?
I do have the plugin that allows 03 to handle .docx and .xlsx files, so I'm not stuck if someone sends me those.
I've installed the release version of Win 7 on both machines now, and zapped the multi-boot facility, so I can't experiment with Office 2010 unless I do more faffing with hard drives.
Sufficient unto the day...