It would be good if you could tell us which Dell your dad has, and which wireless card came with it. I have a Dell Inspiron 8200 that I added a Cisco 350 mini-PCI wireless card to, and I have no problem with it on my 802.11b wireless network. But you must be aware that there are differences bewteen the way Apple handles things (and names things) and how everyone else does these things. More info will let us translate and instruct.