Unfortunately, I have to fully restore my PC. It came with MS Office (2000 if I recall) but I have upgrade version to get to 2003. When I restore the PC, I'm going to lose the MS Office completely...right?

If that is the case, how do I save MS Office so I can reinstall it without actually having the "full version" of MS Office?
If I'm wrong, what will remain on the PC after the restoration?

Hope I'm making sense. let me know...Thanks!