DONT do it yourself (IMHO). Trust the pros. In my area a remote start installed, w/2 fobs, does door locks & trunk release, w/1000 foot range and lifetime (as long as you own it) warranty is 350$ tops. I imagine it gets kinda' cold in WI, jumping in a warm & deiced car is awesome (and safer). All I know is that theres a LOT involved in a DIY, you gotta beat anti-theft for one............... Good Luck either way! E.