Hopefully you guys can help me, because I don't know squat about this. I just built a new PC and I want to give my old one to my mom to use (ASUS P4P800, P4 2.4GHz, Windows XP Home). This will be put in a room just off the living room in their house. In my niece's bedroom (which is one room away) she has a Linksys router (I believe it's a WRT54G). My niece has agreed to set everything up herself because she doesn't want anyone messing with her computer. Fine. Whatever. Less headaches for me.
My dilemma is in choosing a wireless card for the PC. What do I need for this? I started looking around but the terminology has me completely lost. There will be a wall between the room the PC is in and my niece's router. Will that be an issue? Any help would be greatly appreciated.