Creating Custom Ringtones

[.:Tyler:.]

Hey all.
I have absolutely 0 experience with modding GTA. Im not new to modding, just to this engine.

I simply want to Change a default ringtone, or even create a new one. But i dont know how. I'd also like to change LCHC's playlist if its possible.

Any insight on helping me out?

Once thats done, i will probably create some new textures for Shirts. Band t-shirts.