Its not answering your question but why not consider using Open Office instead?
Its free and while more "Office 2003" like than "Office 2007", the Office 2007 interface is not to everyone's liking.
Try www.elara.ie. I just bought Office Home Academic for €89.91. This includes Word, Excel and One Note and can be used on three PCs. (Very happy daughter dispatched to college with a revamped ancient laptop!) They also do Office Pro for one PC only and costs €204.12 incl VAT. It has the full range of Office programs.
A brochure came through the door for www.click.ie today-they are selling MS Office Home and Student (Word, Excel, PowerPoint and OneNote) 2007 for €79.99. They have shops as well as a website.