How to upgrade a laptop to 802.11 abg for $30 by ZDNet's George Ou -- Learn how to upgrade your laptop internal wireless adapter to support 802.11 b/g and 802.11a for $30. No need for expensive and bulky Cardbus adapters that ruin the form of your laptop. Follow this step-by-step guide to install your own Intel2915ABG 802.11 a/b/g adapter."One problem is that IBM apparently blocks use of non-IBM cards. The article gives a software workaround.