Paid yesterday morning, and it's in the house already, the one night I'm stuck working late

ITG filter, tappets, discs on the way. It's starting to fall into place now...
So, all I need to know now is how to fit the thing

Anyone know of any fitting guides for an exhaust out there?
I've not the most mechanical of minds, so maybe I should shell out a few quid to get it done properly? If so Anyone know a good place to get it done, or would like to volunteer a bit of a time for a few squid....
Cheers
Colm.
Ps if anyone wants the standard GR exhaust, bit of work needed on it tho, rust and can hear air coming out so must be cracked somewhere, you can have it when i have the mongoose fitted.....