read this
http://forum.osnn.net/showthread.php?t=79510
edit: a little more down in the page (I think you might still need to download the driver on the first post
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To transfer MP3's to your phone for use as a ringtone use WICK'S WALMART METHOD
WICK'S WALMART METHOD
For this method you need a data-enabled phone w/email address. You do NOT need a cable. You WILL incur data transfer charges and you cannot edit the ringtone. What you hear on the webpage is what you get.
1. Go to www.walmart.com (other shopping sites may be similar)
2. Click on the Music tab at the top of the page.
3. Search for the Artist and CD you like
4. Scroll down to the track listing and select a track
5. Right click (or Mac equiv) on the track and select Properties
6. Copy full url address to the clipboard.
7. Open your mail program and address an email to your phone
8. Paste the url into the email body and send it
9. Retrieve the email on your phone
9a. Press forward
10. Copy the url onto the phone clipboard (menu copy)
11. Open your browser go to the url by pasting it into the address bar, or using "Go To URL" from the MediaNet program (Cingular) and pasting.
12. Your browser will automatically download the MP3.
13. Press Store
14. Assign the stored MP3 as a ringtone.
15. To rename the ringtone, go into My MEdia, Sounds, select the ringtone name, "more" and see "rename". just do it.