[CREDO]

Will someone please just tell me how to enable the WEP? My dad isn't listening to reason, here.

it will be in the config of the router somewhere.
under security, or wireless, or WLAN.

just choose what size key you want to use (128bit is good) and make up a string to go in the keybox. you can use any combination of letters and numbers. it's basically a password.

then you also have to setup the wireless cards on the computers with that key.
it's in the card's properties, under wireless networks.