then it shouldn't be to bad.
But as said before make sure to extend those wires and you should be set.
Make sure to double check you wiring guides.
Here is what i found for the factory colors. Make sure you go off of these and not the ones of the aftermarket h/u
Constant 12V+ Green/Yellow
Switched 12V+ Yellow/Black
Ground Red or Black
Illumination Blue/Red
Dimmer n/a
Antenna Trigger n/a
Antenna Right Front
Front Speakers 6" Doors
Left Front (+) Orange/Green
Left Front (-) Black/White
Right Front (+) White/Green
Right Front (-) Black/White
Rear Speakers 6" x 9" Rear Corners
Left Rear (+) Pink/Green
Left Rear (-) Pink/Blue
Right Rear (+) Pink/Blue
Right Rear (-) Green/Orange