So, I backed up my cities before I did a change in OS (went from vista 32-bit to Win 7 64-bit). When I copied the backups Cities to the regions they were in I can't see them. I'm propably doing it wrong. If someone would be so kind as to tell me how to do this.
P.S. It's a non-modded Rush Hour.
I had that problem a couple of days ago and I was able to fix it. I don't know what backup media you are using but I used a memory stick to transfer my region across since my external hard drive would not copy my region across properly. If your region copy's over too quickly it is probably going to create a blank region which is of no use. Try experimenting with different media drives if you have access to them and also check to see if you have installed all the maxis/EA updates which can be found on this site under support (eg update ep1)
Hope this helps
-Stephen