Thanks for this.

I managed to get hold of a telephone number for microsoft. I gave them a ring, they answered really quickly, asked me a couple of questions & gave me a new product key.

The person stayed on the phone with me while I installed Office 2003.

A little while later, I got an unexpected follow up call, asking me if everything was ok with it, he went through testing it with me to make sure it was working ok.

Brilliant service.