To answer your question, have your neighbor do the following,
(Don't type the quotes just the command inside)
Click on start, then run
You need to have a different IP address than he has, so if his is 192.168.1.11, pick the last number and add 100 to it to be safe, so yours would be 192.168.1.111 (just an example)
Your netmask will be the same as his, 255.255.255.0
your gateway will be the same as his
You also need to have the DNS servers that are listed, there should be 2 of them, write both of them down.
So, on your sheet of paper, you will have a unique IP address, the same netmask and gateway, and 2 dns servers.
Go to your PC, start, control panel, network connections, right click on Wireless Network Connection, then select properties, On the general tab screen, Select Internet Protocol (TCP/IP), and click properties,
Then enter your unique IP address, netmask, gateway, and both dns servers. Click ok, then ok again.
Then on your notebook/pc, click on start, run, type cmd, hit enter
hit enter, your info should match your neighbors except for the IP address
now try to get online with internet explorer, you should be successful, if your not, post back on here with your results and I'll get back to you.