Don't think I can help you (though if anyone can point the direction of how to program custom-made ring tones of a Nokia 5185, *I* would certainly be happy ), but it DID remind me to let people know that if you have an AT&T cell phone contract, you can now purchase (for $1 or $2) Disney ring tones. My husband has "A Whole New World" ("our" song). Me, I have Verizon so I can't do diddlysquat at this time (except watch my battery get loose AGAIN).
I know where you can get free ringtones for the Nokia 5185 (that's what I have). While there's no composer on the phone, if you go to www.2thumbswap.com they have free cell phone ring tones. I thought they had Siemens, too, but I can't quite remember.
Anyways, for the Nokia ones, you have to have text messaging available on your phone. Not all of the rings work just yet, as they admit, since it's still in beta testing. Still, you can get a few good ones off there!
I have a self-made "It's a Small World" ringtone on my Nokia... It's actually quite easy. If you can play a simple tune on piano, you can make a ringtone out of it.
For a while I had "Written in the Stars" from Aida, but I didn't think it made any justice for the song...
I have an Ericson phone that lets you create your own ring tones. I had lots of fun composing my own. If you can read sheet music, you can definately make your own ring tones. I created "When You Wish Upon a Star," "The Mickey Mouse March," and "Fortuosity." I was playing around with "One Little Spark" but I couldn't get it to come out the way I wanted. I just used one of my Disney piano books and put in the notes. I think it's more fun to make your own! If you need any help, just let me know.
I use Nokia and I could arranged lots of Disney ring-tones for mine.
I have It's A Small World,A Whole New World,Beauty & the Beast,Under the Sea,You Can Fly!!,All in the Golden Afternoon,Bella Notte,Reflection,Colors of the Wind,Go the Distance,Someday My Prince Will Come,You've Got a Friend in Me,You'll Be in My Heart,A Dream is A Wish Your Heart Makes,Part of Your World,and many more.