I am trying to expand the range of a wireless network for a friend's business. There is currently a netgear MR814V2 router. They got a Linksys Wireless-G range expander(WRE54G ver3). This expanded the range to a degree that they were just satisfied. They have multiple rooms in a line, about 20 rooms in total in the shape of an "L". (7 rooms at the horizontal part of the "L" and 12 rooms on the vertical part of the "L". The rooms all have a thick concrete walls in between them. I put the range expander in the "attic" above one of these rooms. Some of the rooms on the vertical end were unable to pick up internet. The router is at the end of the horizontal part of the "L". The problem that arises is that the router must be restarted everytime the internet on a laptop is used. This obviously is not good. Can anyone suggest how I may fix this, or something different I can try? Also, can I get another wireless router and pick up the signal from the original router. If this is possible, I could probably buy the routers at a cheaper price since the expander cost about $100. If I did this, would I get the same problem about having to restart the router everytime someone tried to connect to the internet.