I followed the instructions here: http://openwrt.ebilan.co.uk/viewtopic.php?f=4&t=90
Normally I'd post a question there but the account sign-up process isn't working currently.
I got stuck at section 6.3[1]
The errors I got were that although uboot stopped on a key press I didn't get a prompt, the display just held at the count down,
I tried the copying the commands into a command prompt window in the directory holding all the setup files (this is all Win 7 by-the-way)
but got an error along the lines of 'command not found' or something similar.

Does any kind soul ahve an idea of how I should proceed? Thanks in advance.

[1]
> 6.3 Open a Windows command prompt, change directory to the folder containing nc.exe, copy & paste the following:
>
>  nc -n -u -p 6666 -v 192.168.1.11 6666
>   
>6.4 Then quickly at the KiTTY SSH prompt, enter the following:
>
>  system reboot
>   
>6.5 Observe the U-boot boot process, and the BT firmware boot.
>6.6 Repeat the process, but hit any key to interrupt the boot process and access the u-boot command prompt.
>
>@@@@@@@@@@@@@ STAGE 3 - INSTALL OPENWRT @@@@@@@@@@@@@
>
>7.0 With tftp32.exe still running, copy & paste the following commands, in order, into the Windows command prompt, waiting for each one to >complete before moving onto the next:
>
>        tftpboot 81000000 openwrt-lantiq-xway-BTHOMEHUBV2B-uImage
>        nand erase 0x004000 0x1ffC000
>        nand write 81000000 0x004000 0x200000
>        tftpboot 81000000 openwrt-lantiq-xway-BTHOMEHUBV2B-uImage-initramfs
>        bootm 81000000
>