Mo DeLonge, Using a firmware that is already themed can be a problem if it is not the right firmware for your player. The safest way to do this is to modify your own firmware rather than use someone elses. To do this you need to extract your firmware from your player using S1fwx which you can download here:

http://www.mympxplayer.com/dload.php...le&file_id=136

There is a tutorial on how to use S1fwx in the Knowledge base here:

http://www.mympxplayer.com/viewtopic.php?t=66

To change the images in your firmware you need S1res which you can download here:

http://www.mympxplayer.com/dload.php...ile&file_id=16

A tutorial for s1res is here:

http://www.mympxplayer.com/viewtopic.php?t=206


Once you have modified your firmware just upload it to your player using the firmware upgrade tool. you should not run into any problems if you modify your own firmware but be sure to keep a copy of your original somewhere safe or better still upload it to the site.