After my last disaster when I tried to reinstall FoG after I bought a new Windows 7 PC, see here viewtopic.php?t=19512&postdays=0&postorder=asc&start=0, then I thought it may help if I shared the good news that it can be done quickly and easily if you do everything correctly.
For reference, the correct sequence to do things is:
- Reinstall field_of_glory_1.01
- Reinstall rise_of_rome_1.1.0
- Reinstall field_of_glory_fullpatch_1.3.3
- Run the program and run the online updater
If you don't know your serial numbers then you can find them here http://www.slitherine.com/my_page