I have purchased OfficeXP professional and installed it on my machine. Since then I have developed an issue not relating to OfficeXP but it requires me to format my machine and reinstall. How can I do the install of Office again without recieving the "Product already registered" code. Is there a phone number you can call to give them a different number like off the package or the disk itself. I mean there has to be a way to reinstall it if you have purchased it. Right ?