Motorola RAZR V3

OK, so i just got my new razr v3m and i need to know a few things. First of all. I have my usb cord and i can put songs on my phone but how do i make it a ringtone? Second, how do i put wallpapers on my phone off my computer. Third question, how do i put a video as my wallpaper...when i go to edit wallpaper, none of my videos come up. Fourth question, is there any way to change the exterior wallpaper on my phone? And by the way, im pretty good with computers but when you start telling me to change te wav file to a .mp4 to mpeg3,,, i dont know what that means, so keep it simple 😁 . thanks.