On a Samsung Intensity how do you make a song into a ringtone?

When I was getting songs on my samsung, instead of using rhapsody I used windows media player. How do you take these songs and make them into ringtones?On a Samsung Intensity how do you make a song into a ringtone?try using a site called Ventones



this is the best site without a doubt DOUBT



step 1 upload a music file

step 2 select what part of the file you want as a ringtone