I've got OpenWRT running on a 502T, I'm not sure the wireless works on the G604T there's a page that's a bit out of date here http://oldwiki.openwrt.org/OpenWrtDocs(2f)Hardware(2f)D(2d)Link(2f)DSL(2d)G604T.html
it's a little hacky but mite be worth a try, I can give you pointers and I'm sure you could find some more help on irc://freenode.net/#ar7 or #openWRT > Has anyone out there got any of the *WRT offerings on one of these? I've > got one here that's useless, as I can't access a few sites ( linkedin > being the most important ) with the latest available NZ firmware. > > Cheers, > > Steve >
