How To Install DD-WRT on Linksys E1000

1. Read the Peacock Announcement. 

2. Download dd-wrt.v24-15279_NEWD-2_K2.6_mini_e1000.bin. If you wish to experiment with a newer build, you should read the "build thread" for any build you are considering putting on your router, before flashing a newer build, (as discussed in the peacock announcement).
3. Set a static IP on your computer to 192.168.1.7. Subnet mask should be 255.255.255.0

4. Connect the lan cable from your computer to a LAN port of your router. Make sure your router is plugged in. Nothing should be connected to your computer or the router except the lan cable between them.

5. Ensure you have a physical ethernet connection to your router, and disable your wireless adapter, antivirus/firewall protection, and any software that makes strong use of your network (BitTorrent, Streaming Audio/Video, etc).
6. Perform a hard 30/30/30 reset. 
7. Navigate to http://192.168.1.1/ in your web browser of choice. 
8. At the Linksys Management Mode screen, do not give the reboot command. You will use this page to upgrade your firmware.
9. Browse to the firmware you downloaded and click Upload. 
10. Do not touch anything. The page will tell you that the upgrade was successful and the router is now rebooting. Your router may take upwards of a couple minutes to reboot. Watch the lights... once the wireless and power indicators are on steadily for several seconds, your router is fully rebooted and you can click "Continue" in your browser window.
11. If the DD-WRT password change page displays, your upgrade has been successful, and you must now perform another hard 30/30/30. This time, when you navigate to http://192.168.1.1/, click "Reboot" and wait for the router to come online again so you can configure it.If the DD-WRT password change page does not display, your page request times out, or you can't ping 192.168.1.1, make sure both wireless and power lights are on steadily first, then do a hard power cycle (unplug the power from the router--do not do a 30/30/30 reset). Wait a few seconds and plug the power back into the router. Wait until both wireless and power lights are on steadily, then navigate to http://192.168.1.1/ in your browser of choice again. If the DD-WRT password change page displays, your upgrade has been successful, and you must now perform another hard 30/30/30. This time, when you navigate to 192.168.1.1, click "Reboot" and wait for the router to come 
online again so you can configure it.


sumber: http://gdgt.com/question/how-to-install-dd-wrt-on-linksys-e1000-dy9/