W580i Personalized Ringtones?

I just got the w580i and am still pretty much a nub at it.

I've gotten as far as getting the 1gb M2 upgrade, almost filling that up, and getting a bunch of audio clips <600K for some ringtones.

Now, I've been wondering and looking around to see if it's possible to personalize ringtones to callers. (Aka. if Friend A calls, it plays Ringtone A, and if Friend B calls, it plays Ringtone B). I couldn't find it online or in the manual so I'm getting a little discouraged but I know if I can't find the answer here, I'll never find it.

Thanks, guys.

I got it to work =D

For all of you who had the same problem, go to contacts -> down to the specific person you want to change the ring for -> edit contact -> right to the 3rd tab (push right 2 times) -> ringtone -> choose the ringtone and save.