Remote Control Program?

Is there a way to remotly control a computer using rednet from another pc?
I want to make a map with a computer and a large monitor, that is higher up then the pc. I know how to do this, I just cant right the program. Again I want a program so I can have a little GUI so I enter a command and it starts running on screen like a sci-fi supercomputer. All I want to use is rednet, not redpower. So can someone help me make this program?

this should be posted in general

Okay, but i cant move it. Anyway, i think I might be able to use the new wired modems on a monitor like in their release screenshot. But I cant get it to work.

Well, we can help you work out issues with your code, but we're not going to write the program for you.

Lyqyd's nsh is still maintained, and should be able to do what you want. I personally think it's overkill, but you know what they say.