camber kits

I am now on my second set of 205/40/17's (yokohama) because my kuhmo's literally unzipped because i did not have a camber kit. my local import shop is charging 240 dollars for only the front set and 100 buck to put them on.

I found a front set for 170 dollars and would like to install it myself. is it any more complicated than changing a tire or should i go ahead and let a professional do it?

also, i noticed with the kits that some correct angles like 1.5-3.0 or 0-4.0, etc. How do i know how much of an angle mine is at and how much to correct it? the insides of the tread are wearing if this helps and my drop is 1.4"

thanks,
derek