Neither. I'm using a gamepad. I chose it instead of a remote because it's cheaper, harder to lose, and I don't have to worry about the batteries going dead.2. What have you found to be better, Remote Control, Mouse, Touchscreen, Touch Pad?
Normally it's done by running an audio cable from the back of the soundcard to your radio. You don't need an amp, but check and see if an "aux in" adapter is available for your head unit. They make things easy to hook up, and don't degrade the sound quality.3. How would I go about hooking amps and speakers up to the CPU? Do I have to have an amp?