O2 Xda II mini / dopod 818 / Qtek S100 / i-mate JAM support MP3 ringtone but the option in File Explorer is missing. This patch will fix the problem. It will add the option in the File Explorer for MP3 file. (For English device)

Steps of Installation
Copy the cab file into the PPC phone and then run it in the File Explorer of your PPC Phone.
P.S. Remember soft reset it after installation

Special thanks to Alex Yu