ASAP I' ll try to improve this article. Now here is step by step installation of OpenWrt for experienced user. NOT for beginners.

From trunk repo

• Kernel: openwrt-atheros-vmlinux.lzma
• RootFS: openwrt-atheros-root.squashfs

• TFTP http://tftpd32.jounin.net/tftpd32_download.html
• Putty http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

You are doing everything at your own risk! Nobody is responsible for what you are doing. Don't do it if you don't know what you are doing! Incomplete BETA version of text!

• Set your IP: 10.10.12.2 (alt. 192.168.1.101)
• Mask: 255.0.0.0

• Start server listening on: 10.10.12.2 (alt. 192.168.1.101)

• Telnet to 10.10.12.72 (alt. 192.168.1.1) on port 9000 to get Redboot prompt

• Verify config ( last point where you can stop the procedure )

fconfig -l

• Clear flash

fis init

• Agree with format

y

• Download kernel from TFTP server

load -r -b %{FREEMEMLO} openwrt-atheros-vmlinux.lzma

• Create partition for kernel

fis create -r 0x80041000 -e 0x80041000 vmlinux.bin.l7

• Download RootFS from TFTP server

load -r -b %{FREEMEMLO} openwrt-atheros-root.squashfs

• Check free space

fis free

• Create partition for RootFS. Replace 0x2E0000 for number you get as difference between last number of free space and the first number. All in hex.

fis create -l 0x2E0000 rootfs

• Verify partition table

fis list

• Reboot into OpenWrt

reset

• Telnet to 192.168.1.1 on standard port(23)

For some Help with the Tags, please have a look here: tags