Nokia N00b trying to change his 'incoming call alert' tone

I haven't used my Nokia 6030 much--it was originally just going to be for emergencies only (I literally used to keep it in the glove-compartment of the car--turned off!) Well, I'm doing consulting work now--and I'm getting more incoming calls (which means keeping it turned on--and wearing it...) Bleah.

I HATE the choices of ring tones that came with the phone--and was shocked when I learned that AT&T wants me to not only PAY for a new one (for $1.99??!) but it's only good for a YEAR?!

That's supreme BS, if you ask me...

Some research today has pointed me to ventones, and after MANUALLY putting in the URL (I couldn't get the phone to use the link from the text message), I managed to get an .mp3 I like downloaded into a "Tones" folder.

I can use that downloaded mp3 as an alert tone--but the 'incoming call alert' menu doesn't show that downloaded mp3--and doesn't seem to let me browse to it.

Do 'incoming call alert' tones have to be something other than .mp3s?

What could I be doing wrong here?

Try to convert it to mid.
Use this converter:
Problems Playing Your Tones?! Download This!

I'm left with the problem of how to get the midi file into the phone... The 6030 has no data cable options...