I put 2 on my old Maxima and one on the G's hood, fenders, and headlights (not the bumper).
I think you could do all but the bumper in a half day. The one for your bumper is even trickier than the 05 and I was not comfortable putting that one on myself.

 

Take it from someone who tried this in the past on a car. It's not a DIY job. I almost guarantee you'll F it up. Have a pro do it.

 

What he said

 

I consider myself to be quite handy, but I think I'll pass on that. Had it done professionally.