expanium
Firstly, make sure you following the instructions on this Knowledge Base -
How to: extract firmware of your player using the S1fwx tool from
here.
(make sure you run the repair.bat after extracting your firmware)
Then look at this Knowledge Base -
How to: Modify your firmware using s1res tool from
here.
If you have any questions after that, let us know and we can help more.
Good luck.