http://www.securitytube.net/
http://www.room362.com/mubixlinks/?currentPage=4

Here ya go

im not exactly sure were i want to  start off in backtrack 4. i read something on sniffing. i have a good idea about arp spoofing and injections. how would a hacker benefit from that? im right now trying to use arp spoofing to capture my router password when i log into it. (my router password not my wpa key) is that possable? im using DSniff. should i be using a different sniffer? thanks alot. and anything that you could tell me, or any tutorials pertaining to backtrack 4 would help alot. i know thats pretty vague. sorry