Yeah I used to have an Alpine Supercharger for my Rodeo (same engine as your Vehicross, just the 3.2 instead of 3.5) and I was going to use the AEM FIC to tune it also, but never got to it. I just wanted it to be safe but a piggyback will never be near as good as a standalone. I daily drove mine so I didn't want to really go that far into it since it wasn't a weekend/play vehicle.

BTW if you're looking for things to upgrade the fuel system, there is a member by the name of Crash on planetisuzoo.com that had bigger injector kits for our engines, maybe you can PM him on there and see if he still has some. His rig is also supercharged and he is running a higher flowing fuel system and a smaller pulley on his supercharger for more boost.

Also, PM JLEMOND on planetisuzoo and ask him for the ECU wiring diagram and pinout for your VX, i'm sure he probably has it. I got one for my Rodeo from him and it helped me out a ton.