connecting 2 computers

Hello,
i have a desktop (compaq) running win ME, I have a linksys pci card I
installed.
laptop running win xp with a wireless adapter(pre- installed) they both are
the 802.11 b/g.
i have a dial up service.
i want to know what else I need as far as hardware, or is what I have enough
to share internet.
i want to use my desktop as the host and the laptop as the client.
If anyone could give me a step by step setup I would greatly appreciate it.
thnaks