You can d/l ringers to the lg4400 and lg6000. You need to find a program called bitpim. Then you just need to find the data cables. Any midi file will work with the phones.
Go to "howardforums.com" and do a search for any cell needs. It's all there. Also go to yahoo groups and search for groups about LG phones, plenty there also.
the new LG6000 (camera phone) doesnt require a cable to get wallpapers and ring tones on it. you can actually email the files from your computer to the phone and save them on the phone
www.howardforums.com is great, but if you don't like the way the song sounds look around for another copy cause I have some songs that one version sucks and the other one souds great. I gues you have to know what you are doing when you convert them.
If you have the new LG6000, you can most certainly download ringtones through picture messaging. Just email a picture message to your phone with a midi file attached of the ring tone you want! For the other LG models, I'm not sure.