Not sure if this is exactly what you are looking for, but I have posted a new mod guide in the peripheral's section for airport base stations. The guy actually use his extra satelite antenna. Might be worth taking a look.
"Fix it 'til it Breaks."

Jacob - EiC & Director of Technology
Mac Pro Quad 2.66 - 4GB RAM
160 GB SATA RAID 1 - 650 GB Storage
Quad 19" Widescreen LCDs
Accessorized to the Hilt