Plenty of exhaust videos here, sure there is one with a lunch box delete
And the how to here
I personally wouldnt bother, its just going to make noise and not help your car in anyway. I wouldnt spend my time doing this mod, the return isnt worth my time. Of course, you are free to do what you like, your car and time. If you enjoy spending the time on this sort of thing, by all means go for it
My two cents would be to start saving for a proper, 2.5" flex pipe back system.