Ringtones & Motorola ROKR Z6m?

I just got my phone and i've got songs downloaded onto the mp3 player, is there anyway to make them ringtones? I've tried phonezoo and ventones, neither of them work on my phone. Someone help me please.

try to send them to a friend through bluetooth and have him sent it to you back then save it as a pix message or you could get them through a site.