Hello. I recently moved into a three-story townhouse, and I want to improve the signal from my Linksys wireless router so that each area of the floors we can get a decent signal (some area are either too weak or nonexistent). It would be great if I could get the signal from my yard as well. What is the best location to place the router in? Is there hardware or software that I can use to improve the signal? There is one shared wall in our unit. What special considerations should I be aware of in terms of security? Thank you.