1. add a nic card to each machine and then connect them together using a crossover cable. you will be able to share all resources between both machines as well as the broadband on the host.
2. If both machines have usb connections - connect them together as above using wireless usb adaptors.
3. attach each nic to a router. this gives you capacity to add more machines at a later date.
You will need to run some sort of home networking utility in 98. I think this is not as straght forward as XP which I run although you will have to do something that tells windows which is the host machine and which is the client.
If you search the helproom you will find many links to broadband networking.
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