I have this setup and it works
http://www.youtube.com/watch?v=OWVPZSQqUZg
after that on Pc you must change in your wireles network connection properties:
in Internet Protocol Version4(TCP/IPv4) properties:
IP address 192.168.1.122
where 122 could be diffrent
subnet mask 255.255.255.0
Default gateway 192.168.1.1
default gateway is your first router IP address(wich is connected to internet)
Prefered DNS server 8.8.8.8

this settings must be applied in your n900 or other pc, phones