Ringtones-How do they work?

I just recently received a pleasant surprise. My youngest sister had graduated from high school earlier today, so as a gift my parents went and bought her a snazzy cellphone; a Motorola Black RAZR V3. The surprise for me, though, was that they decided to buy me one as well.

Since this is the first high tech cellphone I've owned in years, I'm completely new to all the workings of a phone like this. So the first thing I want to figure out is the ringtones.

First, how do I transfer ringtones to the phone? This phone only has one outlet (used to hook up the recharger), so I assume I'll have to buy a cable that connects it to my PC. The second question is the types of ringtones out there. I did a little google search, and found different kinds, such as custom midis or actual mp3 rips.

And last, but most importantly, is how to download free ringtones. Is there a site where I can download any kind of ringtone for free (preferably the mp3 rips)? Or is there maybe a program where I can convert my own mp3s into ringtones?

I suppose while I'm at it, I'll ask where I can get free wallpapers and screensavers as well. I'm enjoying this new phone, but I don't see the need to pay extra for ringtones and such if they're available for free. Thanks for all the help.

Jam it back in, in the dark.

Sounds a lot more complicated than I thought. I downloaded a mobile ringtone converter from mininova that can save mp3s in different formats. What format are ringtones usually? Or are they just mp3s?

http://www.mininova.org/tor/303097

Version 4.04. Will this work?

There's nowhere I can't reach.