I use myxertunes alot, and i dont know what you need help with. I have a verizon phone and all i have to do is on the website put in my number check the box, and i imediatly get a video/text message. I open it, and use the right clicker on my phone and push save as ringtone or save as sound.

If you could explain beter what step your having trouble on, maybe i could help beter.