use itunes.....can download at www.apple.com

wat do u mean?
u use itunes and create a new playlist...then drag and drop the mp3 into the new playlist.....then after u done, just press auto fill

btw 500 mp3 into a 1gb ipod, is not gonna fit

maybe the mp3 not in 128kbps.....anyway, press the + button on the left bottom on the itune,tis will create a new playlist...select the new playlist u created and u can see there is no song in the playlist yet..now u open explorer and start to drag the mp3 u wan into the new playlist..after u done,plug the ipod in,itunes will detect the ipod and sync it..after syncing, select ur ipod(found on the left center on the itune), press auto fill on the bottom of itunes to transfer the mp3 into ipod

welcome bro....