[saabmania2]

a basic setup would be:
1)cable from modem into the dsl connection on router
2)rj45 cable from 1 of the 4 network ports on the router into the back of your main computer.
3)then switch off both router and modem wait for about 20 secs then switch on in following order.
first switch modem on wait till the steady light stops flashing, then switch router on this should give you a connection to the wired pc,
then try to connect via wireless if you can then it's ok you just need to setup your network security via the router settings in the instruction manual.
hth