Hi guys, this is a great site. I am a noob here and am looking for some direction on how to mod my MP4 Player.
I've read some of the stickys but I still need some help
First of I need someone to show me how I can figure out some specifications of my MP4 player
Next what firmware to upgrade to and if it is even worth upgrading firmware
Third what theme's I can load on my player
Last how to backup my firmware
I've never moded mp4 player but I have moded my Motorola e398 phone so I have some knowledge on modding
Thanks in advance to anyone that can help me, here is my MP4 Player, pics and info:

It's a 1 GB MP4 Player with 1.5" 64K color screen
This is the information I found in the System info option:
2005/12/16
3.5.35
2006/02/10
JTYMDO46V4