I am pretty sure i can handle wiring the doors to the 4 channel and doing all of that...but getting into the dash and wiring up the dash speakers with crossovers to the HU sounds complicated...is this a smart thing to do?? wiring the 4 doors to the 4 channel and the dashes to the HU??..my HU does 22w rms dashes are 20rms and my doors are 40rms my 4 channel is 36x4@4 ohm@14.4V roughly...is this cool??