Jump on ozfoz.com mate, there is a shitload of info.

Stage 1: Rip out resonator, TD04L, 3" turbo back exhaust, manual boost controller, boost gauge. Run 11-12psi, I found my boost cut was 13.5psi (most are ~13psi). I also added a fuel pump when I was at this stage for a bit of piece of mind.

Stage 2: Same as 1 but take off the manual boost controller and add an Apexi Power FC (There are other brands, Link, unichip etc) and fuel pump. You can also add a cold air intake, larger IC or headers at this stage if you want.

Stage 3: Same as two but with the larger IC and a VF turbo with the option of once again adding the cold air intake and headers.

You will see a nice gain over standard with any of these stages