My coworker has 6 computers at home (a mixture of platforms), a two story house. He uses a Linksys WAP11 802.11b wireless access point connected to a firewall device connected in turn to his cable router. Things work fine, except for his main computer upstairs, the furthest one away from the point of entry. He upgraded this computer to 802.11g and wants to get another wireless access point, such as the Linksys WAP54G. That way, this one computer will have a better and faster connection. He doesn't want to spend more money to upgrade the other computers. The question is whether this will cause trouble for the WAP11 and the other computers. Can the two access points sit side by side and coexist peacefully? Can he use WPA on the WAP54G? Any other considerations?