for the love of god!!!linksys you turd!

i'm reaching the end of my tether here. i've got a linksys WRTG54 V5 which is really starting to piss me off. I've currently tried everything i know on it and it just does not want to work. gone though it, set it up (i use PPPoe for my connection, which seems to work for about 5 minutes. then it suddenly chooses to stop me from accessing any web pages. it tells me that it has found the page, and is loading but hangs till it gives me the "cannot connect to server". I know that it is connected, because i run Bittorrent (...for linux and other non copyright material ofcourse) which continues to download. and i've used
cmd --> ping www.google.com
which gives me a response.
I have tried using 3 different PCs, tried restarting the router, modem, PCs everything i can think of.
I have also used both wireless and wired to no avail, they still connect but they dont go online.
I know that it may seem like a DSL problem futher down the line, but even when i tried to enter and edit the settings i.e.
192.168.1.1, it will hang regardless of wireless or cable. I've become soo pissed off with it that i nearly threw it out the window, can anyone PLEASE help me???
I apologise about the capslock