Hi guys, thank you for taking the time and trying to help.
Here's a photo of the front side of my player :
Here's a photo of the back :
I'm not sure which chip does what, so I'll give the details written on them according to the back image of the player :
Top left chip (largest):
hynix KOR
HY27UU08AG5M
TPCB 803A
Top right chip (medium size):
AK1025
7K062AB 0KN
Botton right chip (smallest):
SP3767AHN
07KS09
Please, I've tried at least 20 different firmwares, HELP ME !!!!
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update - 05/04/08
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Hey zrock, thanks for the tip !
After some (probebly unreparable

) damage, I've managed to get the board number :
G-18A_Key_v0.3
2007.09.08
According to the following image :
Maybe now can I get some more information ?
Thanks !