You could set media player how you want it then close it. Then open regedit (start->run->regedit), go to hkey_current_user/Software/Microsoft, locat the folder "MediaPlayer", right click and go to export, then save the tree as a .reg file. You can then double click the reg file and it will automatically be inserted into the registry of the machine you want it on. Keep in mind that there may be some unique keys generated based on your user account on that machine, and they won't be transfered to another machine or installation.