How do I strengthen my wireless signal in my network... ok im kinda a noob at this cuz i just got it on saturday... i have wireless g so its 54 mbps but it fluctuates like mad (from 1mbps to 5 to 36 to 48, its never constant) especially cuz the router is downstairs and im upstairs.. is there some kind of hub or something that amplifies the signal where i can put it by the stairs or something?