I don't know why I didn't see this earlier, but if you are an O2 XDA mini, dopod 818, i-mate JAM or HTC Magician user, you probably know that your Pocket PC doesn't support MP3 ringtones by default. Fortunately there is someone out there that understands your pain and has brought this fix to life.
MP3 Ringtone Patch by Bong's Work Shop allows you to select any MP3 in File Explorer as a ringtone simply by tapping and holding or "right clicking" and selecting "Set as Ringtone." It's a simple fix and works flawlessly. Download it
here today!