
I've got the Linksys WRT54G so obviously recommend that, but this article should help...
http://www.cableforum.co.uk/board/article.php?a=74
This will help secure your router
http://www.cableforum.co.uk/board/article.php?a=12
This will help you install it without using the NTL CD that is unnecessary if you are putting a router / ethernet connection network.
http://www.cableforum.co.uk/board/article.php?a=13