I was just looking through some posts and it said that tuning your computer was a must, but I couldn't find any instructions on how to do this.. any help out there? Sorry if this post doesn't make any sense, I'm new to the whole thermostat thing and I'm not quite sure I fully understand it :o

You don't need anything else but a plastic bag to catch the coolant that is going to come out. I don't believe you need to reset anything. It's really quite easy.

Installing a new thermostat does not require a tune, guaranteed.