you will never going to find/explore protected files/folder using pc suite my friend...what you need is application called filebox (install it on your phone) & enable root (filebox setting) before you can go any further...
after installing open filebox & go to this path...

usr/share/themes/*name of the themes u currently using/mediaplayer

inside the media player there will be a bunch of images...copy all images & paste it on your microSD (if you have it) or paste it somewhere in MyDocs folder...
after paste it then exit filebox & connect you phone to pc using mass storage...find the files you have paste before & view it size/transparentlity & etc...make sure the new icon you make is the same size as the original...after making sure (copy your new icon to have created into MyDocs folder) then exit mass storage & open filebox again...
this time copy all you newly created icon & paste it at the same path as before...if you do it right then it will ask to overrite the files...overrite it then exit filebox & reboot...you will find the changes after rebooting...