Getting to my Router on Linux...

Ok I am hoping that someone can help me. I dont know much about Linux, or the wireless network we have in our house. All I know is that there is a wireless card installed in my computer.

Model: [glowpurple]D-Link AirPlus DWL-520+ Wireless PCI Adapter - Packet Scheduler Miniport[/glowpurple]

Now I just finished my installation of Red Hat 9 today, and I want to know a few things.

First though, my goal is it get to the internet.

1: Do I have to be on my network to get to the router.
2: Will I still be able to get to the internet even though all the other computers that are on the network are using Windows XP.
3: What do I have to do exactly to get to the internet from my router.

If I am not suppling enough info... please tell me what you need to know. I dont know much about this kind of stuf... but it would be great if you can help me. Thanks!