Can I upload themes to two of my players?

[serj]

Well...first of all I'm glad to be here.

I was looking for some help around but I couldn't find any...I hope I can find it here.

Enough of introductions lol. The thing is that I have 2 mp4 players. One of them is a Master-G S512MB with the firmware version ACT2097_S72_1 9.0.50 . EDIT: I read around here that this firmware can't be extracted right? So if that's the case, please forget about that.

The other one is a iPOD nano which is very very similar to this one:


The front DOESN'T HAVE THE "M" thing on the controls and it says MENU, and below of it, the "play" is not present, there's nothing, and below this "empty" circle is the word VOL. Also below the screen has the ipod BUT in a VERY VERY SMALLER letters. The firmware of this one is: LG MP3 Player TJ1303V2 CM50012 - ACT_V9.1.51 (2007 / 05 / 04 )


My question is: Can I upload themes to one of them or both if possible? Would you like to see some screens of my players first? Do I need to upgrade something? Where I can get the themes?

I apologize if I did any stupid question or n00bish actions.
Thanks in advance!