Well I tried to repair the windows installation but just after copying the files(in the blue screen),when the Xp installation screen flashed i got an error for a file missing and that the CD of the XP was needed.
The file was 'asms' which is actually a folder in the I386 folder inside the windows CD.(Of course it was in place too )
Anyway i couldn't get past that so i formatted the disc with the XP(as if i wouldn't eventually!!)and set it up from the beginning.
Now everything's fine for the time being but i intend to keep both Os's for any case.
Thanx for the help