Why pi*s about like that? Just get a mod, put the disc in and off you go. That is why your backup won't work, those swap doscs suck. Btw - you said not to go and tell you to get 'another mod' - er, you don't have a mod yet, you have some crappy swap discs.
Anyway, I agree with Tyler - telling you to get a modchip really REALLY does help!