FG XR6T - Turbo back exhaust system - what to do

Hey guys, new to the ford xr6turbo side of hptuners, been using hptuners for my ls vehicles for a bit but still an amateur.
I have been offered a turbo back exhaust system and have been told ill need a retune. What exactly needs to be done? Am i able to just tweak a few settings in hptuners and get her safe to thrash?

Cheers

Hey buddy long time no hear

Remember this lol

http://i.imgur.com/yn6Ybs7.jpg

Haha good times, keep in touch with jamie ?

Long story on the turbo but buzz me a pm and i can walk you through it via txt

HAHA yeah i remember, creepy you have this photo still though.

Was hoping youd see this and reply, will shoot you a PM

I started a long time ago taking piks and documenting my time through the course for people who were interested so there's heaps of pictures and detailed explanations

Thank god i did because my memory is like a siv at the best of times ... Plus you don't see this every day pitty it made just over 300 hahaha

http://i.imgur.com/DvVBmfl.jpg

http://i.imgur.com/Dud2ueJ.jpg

http://i.imgur.com/RgyiYZd.jpg