Mudflaps for 9-5 NEED HELP BAD

okay guys im in DEEP DEEP **** rite now, i ordered a set of Sparco Universal Mudflpas (google them if u want to see how they look like) and i when they arrived i realized i need to cut and fit them to my 9-5 and the arcs behind the wheels...only problem is i have NO idea whatsoever where to begin or how to begin....i do not want to take it to a mechanic because he will just drill the wholes into my arcs and slap them on... i actually want them to look decent and fit right...i have a 2005 9-5 soon to be slammed in a week or so and with these mudflaps it will look sick...i know i know saab with mudflaps? but i wana try it out and make it look unique... if u guys want pictures or anything of the flaps ill be glad to post it
SOMEONE PLEASE HELP I DONT WANT my 60$ TO GO TO WASTE AND I CANT RETURN THEM :(