The ringer will be stored on the sd card.... Check SD Card / Downloads
Move the file to SD Card / Media / Audio / Ringtones and then you can access through the stock ringer selection option....
Under Settings / Sounds / Notification
Settings / Sounds / Ringtones
Wildman, will that work for a Blackberry Curve? That is the space where the question was asked.
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.
Oh.. Good point Ann because I did not catch that part... No that wont work on a BB but the user should be able to assign the ringer with the devices music player and I think the downloads are still in the same location still..
The OP should be able to play file in player and select menu and use a ringtone option unless they change this method..
Also here is a link to explain the method for the newer BB devices... http://helpblog.blackberry.com/2010/10/changing-blackberry-ringtones/