Installing new rintones on your Treo/Centro isn’t really difficult unless you use the right programs. RNS:: has produced such an nice little program: TopNewRingtones. The software allows you to add any external file (supported formats: MP3, WAV, MIDI, AMR) as ringtone into the PalmOS ringtone database.
The utilization is simple. On launch you have the choice between importing single songs or all songs from a specified folder.
Regardless which method you choose you will see a file browser window similar to this one:
Here you have to choose your music file or folder. The “ok” button starts the importing process.
After everything is finished you have the choice to change to the sound preference panel and apply the newly imported songs to any event (e.g. incoming call, new text message etc).
Before importing you should prepare your files:
Normally a MP3 file is relatively big in size. This is not very disadvantageous as your phone has got limited storage and the files are loaded into RAM. It is advisable to reconvert you files at first. This can be done with tools like audacity or BonkEnc by reducing the quality (through lowering e.g. the bitrate).
If you want to test the software before buying you can download a trial from the developer’s homepage. The full version costs $9.95 and can be purchased through several vendors.
Product page TopNewRingtones: http://www.ranosoft.net/treo/top-new-ringtones/