Yeah, do like Ive done to every car Ive ever installed a body kit on. Take off the stock bumpers and there you have it.
Once you have taken the stock crap off and paid attention to things like mounting points and hardware that is all the guide you will need to put the kit on. After all if the stock front bumper used say 5 bolts 2 screws and some other crap you are going to be able to tell you are going to need to use those things and the areas they came from to put the kit in the same spot. Keep in mind that not all mounting points and old hardware are still going to be used on the new kit thanks to different size issues.
Just to give you an idea. I have an 04 cavi. My front stock bumper uses 2 bolts on each side of the car inside the wheel well over the fenders. 2 screws in the front behind the stock bow tie molding. It also used alot of that protective black plastic crap with a bunch of clips to help stablize the stock bumper. With my new summit kit from andys auto sport I ended up only being able to use the 2 side bolts pretty much. I had to drill bigger holes into my kit as well as the front clips so that I could use bolts instead of those little crappy drywall esque screws.
So you are going to have to keep all that in mind. If you think you can tackle it then I say hell with getting them put in by someone else. Depending on where you live there may be little to almost no place that will install the kit for you (especially if its fiber glass, most places wont touch the crap) and if you do find a place that will do it and even do fiber glass chances are they are going to rape you on the cost. Down here in AZ I only found one place that will install F/B kits and they wanted $400 just to put the side skirts on.