StarWars KOTOR saved-games have stopped working!

[theoriginalmre]

What relevance this might have i do not know, but...:

The game was working fine. After the 43h period, I decided to back it up. So I did the usual and backed it up succesfully. Then I decided to try out the backup.

I tried to load the saved games I had, and the afore mentioned problems arose. But I found that a new game could be started and saved/loaded fine.

So I put in my original disk, but found that IT had the same problems too.

Whether this has something to do with the backing up or what, I don't know. I'll try the ram thing and hope that works. I'll report back once I've done so.

Oh and also, I lent my backup to a friend so he could try it out. After about 20 hours of playing, he's found that he can load up his saved games, but when he moves from one area to another, and the game 'loads', it crashes on him.

I fear this is related - either it's something to do with backing up, or ??? I don't know.