Thank you for the positive comment.
The transparant selection bar was there allready, it was not modded.
I used the rkTools from the mp4nation forum ;-) Thanks to Maderin, you know him -

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In the original firmware the main menu icons are in 4 different sizes to give them a animated look. I found the animated look too "cheap" and prefered a clean straight forward look.
The startup/shutdown stutters a little bit, the reason because of this is that there are 16 frames to slide the screen 400 pixels. I think it was better to slide the screen from top to bottom, then I have only 240 pixels for 16 frames.
I made a shorter video for mp4nation.
The player is OK, sound quality is great. There is no video resume function. I don't know how long it will last, when I bought it the price was 41 Euro, but I noticed it dropped to 36 Euro since a few days. Basicly I bought the player to play with the firmware, a branded player is too expensive for experimental use.