Re: com.android.settings crash
Don;t worry, I live in moscow.
Some forums have some old "cold war" feelings from the old days. You won't find them here!
I'm going to guess, based on what you say, that the problem is with the Rom. If this happened after you flashed it, I would say it is a bad Rom. This is because you go into the ringtone section, and immidiately it crashes, before selecting an audio file.
If it happened a few weeks or months after you flashed it, then I would say re-flash the rom
I'm not familiar with your phone, so I don;t know what other roms are available.
If it were me, I would re-flash.