I use an app that does a great job of optimising router settings and creating device profiles.. I use wifi via tablet pc and a ds. It integrates perfectly with my wired network devices(gaming pc, htpc, media server) and Ive had to zero extra config to get them on. My sister even can get onto my network wither her mac with zero issues. Folder and print sharing is a breeze.
Give it a go negsun, tis free... (shareware) www.networkmagic.com
Its my number one killer app of all time