I have a pretty big house with 4 floors, which makes it hard just to use one router. My Linksys isn't reaching the top floor or outside very well. I got a D-Link off of eBay, and was wondering if it would be possible to plug it into my iMac (receiving wireless from the Linksys) and extend the range of my router. It seems like I could probably change some setting in the Network prefs that would share my internet connection through an ethernet cable. Is that possible?