I have a 91 civic lx 4 door sedan, and want to transfer my xm ready pioneer aftermarket stereo into it.

This car is like new, 65k on the original motor, and is in showroom condition.
Without ripping up all the weather stripping, i would like to know if anyone has routed an xm antenna into 1 of these models?
Any pictures, or diagrams , or step by step instructions would be greatly appreciated