I had mine done by a shop, cost was $75 for everything. They even disposed of the stock exhaust for me. About the tips, I've thought of a resolution but haven't employed it yet. I'm waiting to get some engine mods done to see if I want to keep the SVT exhaust on. I think it needs a little more HP coming out of the engine. BTW, the problem with the tips is that they curve from behind the bumper to just underneath it to fit in the SVT bumper holes, on a non-SVT car this looks a little out of place...to me anyway. Look in my photopoint account and you'll see what I mean.
IIRC, Limp0229Bizkit installed his himself, took about two hours. Find his post in the 'Performance Mods' section and I think it tells what he did.
Oh, my idea for the tips involves removing the stock tips, cutting small arcs in the bottom of my bumper, and then welding in straight tips to sit directly in the arcs. Sounds weird but the picture in my head looks sweet. Good Luck.
