I have found that in Windows, when the rokr is connected, it shows up as a "Removable Disk" in "My Computer." There are several sub folders, and if you go into the "Mobile" folder from the main root, you can copy and paste anything in there including pictures, video, audio, and ringtones. If you go to the "Ringtones" folder and put an mp3 in there, it stores it on your phone. Unfortunately, you can only use ringtones that are on your Phones SIM card, not on the 512mb Transflash card, which is where it goes when you put it on the Removable disk folders. To make it a ringtone, you have to go into the ROKR after you have transerred it and undocked it from your computer, once in the phone Goto My Media: Sounds : (Select MP3): Switch Storage Device, to put it on your SIM card. My Cingular SIM card is a measily 5mb, so putting ringtones on the 5mb card, doesnt leave with alot of space, which really stinks in my opinion. It seems like such a waste of space. But i have downloaded a free MP3 chopper from dload.com and I am going to experiment and cut up some MP3's to make ring tones.
Does anyone know if Cingular offers an upgrade from a 5mb are there larger SIM cards available to be purchased from Cingular?? Crappiest feature of the Rokr in my opinion.