I'm getting a procharger soon and this is what you need to know, the base kit does not include 42 lb injectors, fuel pump, or MAF. You have to buy the injectors, although procharger says you dont need a fuel pump or MAF. I heard you need a fuel pump for custom tuning and that the stock meter pegs out around 5k rpm. You can get a lightning MAF, but you will need to calibrate it. Pro M sells blow through 80mm MAFs already calibrated for prochargers with 42lb injectors.
If you go with stage 2 procharger, youll need a 3 core intercooler, MAF, and fuel pump, which are included in stage 2 kits.
5.0 mustang magazine installed a procharger with the predator and MAF.ia in their June '06 issue FYI.
As for running 10lbs of boost on stock internals, it's iffy. You'll need a really good tuner. There's a stock GT running on 16psi here, tuned by Ed Clark.