congrats on getting a new mp4 player tatai.
there are no 12 inches and 15 inches screen.
there are only 1.5, 1.8, 2 and so on still about 3 i think.
so probably yours is a 1.5 inch screen.
so you should convert your amv files to a resolution of 128x96 or 128x128.
You can use this
step by step guide by tadad to improve the quality of your amvs.
Follow
this guide for changing themes.
hope this helps
