The only problem you most likely will encounter is having extremely tight nuts and studs on the turbo.... Easy solution, buy a can of wd40, spray all the nuts and leave it for 30min, spray agin and leave for 30 min. That should free them up nicely....
Putting the down pipe on is the hardest part, as its the hardest to get to, but its still quite easy... Take your time, and you'll enjoy the reward of doing it yourself.