Converting *.MST to *.NB0 ROM files...is it possible? If so, how?

[Guest amwafa]

I have a Samsung Omnia II GT-i8000 (GSM) that I purchased from an online dealer, who in turn got it from Singapore. The ROM update process through the New PC Studio provided on Samsung's website from WM 6.1 to 6.5 failed miserably, but luckily, the 6.5 ROM was saved automatically before it was deleted by the program upon update completion. The *.MST portion of the ROM can't be used, only if it's in *.NB0, as my 8GB internal memory spontaneously ceased to exist a few months ago (apparently it's a common problem and only fixable by either formatting [failed for me] or sending the phone to a local Samsung dealer, which is my last resort since the closest for me is in a different country). Also, the company I purchased it from said they can't help me since I 'altered the ROM,' even though it was by Samsung's instructions and program.

The title explains my question, any ideas?