I will show you how to add custom MP skins to your nokia (must be version s40 v5/v6 for this to work)
1. download oxycube
oxy cube download
2. download or make your own .swf media player skins (you can search on google "nokia media player skins .swf)
3.you also need nokia pc suite or nokia ovi suite
nokia pc suite download
nokia ovi suite download
4.close pc suite/ovi suite even from the tray
5.open oxycube conect your phone (if you need run the wizzard in the program)
6. in oxycube click c:/predefhiddenfolder (thats the folder with the system files of your nokia)
7.find predefmediaplayer or mediaplayer and you will find in that folder the skin files
8.backup the skin files in some folder (just incase)
9.rename the files you downloaded/made like the files in the phone
10.replace the original files whit yours
11. do the same with radio (folder is:/predeffmr) and equalizer (you can guess what the folder is)
12. on your phone go to media player ,play some song , click options go down to settings and select media player skin and change it!!!
WARNING i am not responsible for any damage this has done to your phone!
Do not do if your phone is new because it might void your warranty!
This might not work on all phones so replay to me with problems you might have encountered!
Thank you for reading!