That's great about the Space Mountain music! I would love that. But here's some bad news....you can't change your text tones from the few options Apple gives you unless you jailbreak your phone. If you'd like to do that, then I could get Dillon to walk you through it, or if you have any tech savvy friends they might be able to help you. But I know you're kind of against doing things like that. But jailbreaking means you can do things like changing the colours of your text bubbles, changing text tones, downloading themes (there's tons of Disney ones), and just being able to do a whole bunch more with your phone. Only thing is, Apple doesn't like it, so if you ever had to take your phone in, you'd have to un-jailbreak it.