kinda depends on your abilities. The built in card is most likeily mini PCI, and under a cover on the bottom. From that card, there are wires that go to the antenna (usually in the screen). You could buy connectors like those and go to external anteannas. It's going to be a bit of a pain, and you will have to heavily modify the laptop. I would say get an PCMCIA card and/or USB card that allows and external antenna.