Linksys Nightmare

I have been haunted with this Linksys router for 2 years now. I purchased it to obviously network a couple computers together, problem is, once I start running FEE6, Ecr*wl, ect, they compete with each other suck the life out of the connection. I have read every possible thread on BHW about this router and couldn't get it working right. My solution was to run another modem and keep the 2 computers separate and ditch the router, but now I want to add a 3rd computer and the nightmare begins again. Is there a way in Gods creation to make this router ( or any router) work with multiple em*il extr*ctors? Or should I just save myself a headache and get a 3rd modem? Thank you all in advance.