I'm going to guess that you don't know me very well.I'm hardly a novice here...
I disconnected the secondary antenna lead from the mini-pci card and taped it to the side. I then used another antenna connector from another dead laptop to bring the signal out to the external connector, to which I screw on the external antenna. The original aux antenna and wiring is all intact and un-modified. The only alteration to the chassis was to drill the 1/4" hole in the secondary fan grill (which isn't there anyway, and leaves a lot of room to install a fitting). I have a half-dozen spare 5100 series chassis here, anyway.
Not that destroying this laptop would be a huge loss, but I have spent a LOT of time making this one out of a lot of other dead ones. Currently, it's a 3.06GHz /HT/1MB/533FSB, upgraded cooling, 2GB PC2700, 7200rpm 80GB, Nvidia 5200XT w/128 RAM. I fix computers on the side, and I have a LOT of spare parts lying around from dead laptops.