Make Ringtones Iphone 3gs

Custom ringtones on jailbroken iphone 3GS?

I have a jailbroken iphone 3gs on 3.0 firmware and I would like an app that allows me to make custom ringtones with my itunes library. I saw an app called Ringtones, but it only works for 2.0 firmware, and another couple apps that only work on firmware 1.1. Are there any apps out there like Ringtones that let me create and use custom ringtones from my itunes library?
I’m not looking for ringtones, I know how to edit my songs and make my own ringtones on my computer already. I’m looking for an efficient app to create ringtones on my iphone from my music library or at the very least the most efficient way to transfer my ringtones from my computer to my iphone.

go to

http://www.myventones.com

its a free ringtone site

How to make an iphone ringtone with no hassle. super easy to follow and do.

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Make Ringtones on Your Mac $14.00 ‘Make Ringtones on your Mac’ gives you everything you need to create your own custom iPhone ringtones plus over 300 for you to use right away – the ultimate iPhone upgrade! - A huge library of professionally produced loops and samples to create your own ringtones with from scratch - 300 professionally produced interactive ringtone ‘songs’ you can quickly edit, extend, overdub and remix to create…