I have the Student Teacher edition of Office:Mac 2004. I have already installed one copy on one computer. You get three product keys for three installations I want to install it on another computer. The problem is, I can't remember which product key I used the first time round and I don't want to use the same one. Is there any way to find out which one you used once the software is installed? Can one of the moderators pleas move this to Mac Applications, as it is better suited to that forum — sorry.