How to Add and Remove Custom Ringtones to Your iPhone

From Hack the iPhone
Before I get into the instructions for the easy to use program, I want to give credit where credit is due. Because of the hard work of a couple people, "nightwatch", "geohot" and "ziel" in particular, and the rest of the iPhone development team, they created two key programs (Jailbreak and iPhoneInterface) which allow custom ringtones to be installed onto the iPhone. Because of these programs, a new program has been developed: iFuntastic! (by bitSplit Enterprises) which makes it very simple to not only install, but manage ringtones on the iPhone.

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