To install HyperWRT, follow these steps :

1. Download and unzip HyperWRT.
2. Goto http://192.168.1.1/ and enter your username/password (default is admin/admin).
3. Goto “Administration -> Firmware Upgrade”, browse to HyperWRT and flash it.
4. Do NOT interrupt the flashing process and patiently wait until the router has rebooted.
   
5. (Optional Step) Goto “Administration -> Factory Defaults” and Restore Factory Defaults.
6. You now should notice an increase in Wireless Range and Performance.
   See the manual on this site for info on the added features.