Finally found a shop that sold a converter for 2.5in jack to 3.5 headphone jack. Now I can use as a music player (which plays ogg files too btw) in addition to my phone and my PDA.

Centro comes with PocketTunes as the music player. There are settings titled "Settings from PC" and select MTP. Then enable the MTP plugin in Rhythmbox. Plug in the usb connector and start up Pocket Tunes. You'll now be able to manage the music in the player and your collection. Just drag and drop, your current playlist.

Now to find a shop that sells a workout strap case so I can easily listen to music while out for a run or working out.