i have a mitsubishi cruise control kit for my th. How hard would it be to install it or would i have to get a pro to do it?

You win that one off EBay.You should be able to do it yourself if you have done things like this before like stereo installs etc.,Did it come with instructions.

Yeah it is the one from ebay
it didnt come with fitting instructions only operating instructions for when it installed

You may have to have someone put it in.The unit would be stand alone and plug in to places with in the wiring loom.How well do you get on with your Mitsubishi Dealer, they would be your best bet??