Hey welcome to the forums, first of all, and second, no offense but you can find answers to all of your questions mostly by using the search function at the top of the page, or you can google "wma to mp3 converter" and you'll find your answers. If you can't that's when most people start asking questions on gow something is done.
BTW, (by the way) changing the home screen is not really the easiest thing if you just got a PPC (pocket pc). You can check out this page to get more clocks if you want to try it out.
http://forum.xda-developers.com/showthread.php?t=420887
Good luck...
