I'm starting to brainstorm for an MP3 PC in my car. Most people take the complex route, and hook up fancy LCD displays and touchscreens and so forth. I'm not interested in any of that. I want the absolute simplest setup possible. I've already got all the hardware I'll need for the PC, nothing fancy, but adequate. Anyways, the real dilemma is in controlling the computer. I don't want to bother with touchscreens or any sort of display for that matter. That would involve spending money, which I want to avoid. I pretty much want to cobble together a simple 5 button control panel that's hooked directly to a serial (or parallel, I have no idea, that's why I'm asking) port. I should be able to write a simple VB program (pending a crash course in serial interface) that'll play the MP3s. Basically, has anyone done this? Any links to project logs? Advice? How should I go about constructing the control unit? I figured SPST momentary switches, but I don't know a whole lot about hooking custom stuff up to ports, so I guess I'd need to know about this. What else should I consider?