Skydive814, you are correct. running the fronts and rears in parallel will lose the ability to adjust the sound from the front to the rear and vice versa.
The crossover point is another issue here. Since there is a sub involved, the crossover point should be in the AREA of maybe 50Hz. The factory speakers will NOT be able to handle that frequency level with 60 watts pushing it.
The 3 speaker setup is an option for Nutz, then down the road, if he picks up a pair of Pioneer 6x9's he can add them in and THEN I would agree with Ron that he should run them in parallel with the front components or else get a new amp to power the sub and use the 4 channel Kicker to power the fronts/rears.
I would hope that Nutz will be disconnecting the factory tweeters to install the new ones. He did say that the fronts were going to be components.