sorry, but this hilerious, its sig worthy

an upside down disc will not cause 3ROD. if you had bothered to search, you would of found the cause of the 3ROD and noticed its completly unrelated to what you (or your girlfriend) did.
if the console is unmodded and has never been opened, then it has a 3 year warranty on the 3ROD, so your console will still be under warranty. otherwise, try the x-clamp replacement, just dont put the heatsinks upside down as it will make your console send encrypted messages to mars...