one you have to pull your head out of you ass, two forget mylast comment it was rude..... well trans in winamp2.x is done with a txt file named region.txt... now you could do it the long way in notepad or you could download an app.... i sugest www.winamp.com for starters.... that aint so hard now is it?!
Make sure you have Windows 2000 or XP installed and not ME, 98, 95. Then download Win FX http://www.stardock.com/products/windowfx/ it can make any application transparent, just tell it which. It can do other things as well, but that's the main feature.