Okay, I'm going to be nice. Start off with a Searching. In particular look at a couple of members running similar setups. Garrett76, 510six, etc. You aren't very clear as to your fuel induction system, weather it be carb or fuel injection. Since you mention mega-squirt I'm going to assume you're running Fuel Injection.
For the amount of boost that you are running, etc. I'd recommend some sort of aftermarket ecu, i.e. mega-squirt, SDS, or similar. Its not going to be easy to tune in comparison to a NA vehicle, however it depends on WHAT you're wanting to tune. Tuning can be very complex or simple depending on what program you use and what settings you are wanting/willing to change at risk of damage to your vehicle. I'd recommend picking up some of Corky Bells' Books on Turbochargers and Fuel Induction, as well as a book on tuning your vehicle for maximum power. Hope this help, be sure to use the search function on this site, it will answer most of your questions.
Tyson