Okay, I have done MANY searches, which have led me to Ubuntu tutorials, which DO NOT seem to apply to my UI in Mint 12 (Lisa). The upshot is this:
I have a computer which gets internet from the ISP wirelessly. That computer has an RJ-45 jack, which I would like to plug into the WAN port on my wireless router, to beam throughout the house, wirelessly. It's a WRT54-GL, flashed with the latest and greatest DD-WRT (24 sp2 or something). WHAT do I have to DO to get the MINT box to put out to the internet to that damn thing? I'm going nuts here, and I'm pointed to Ubuntu tutorials, which do not seem to apply, exactly.
Does anyone have a tutorial for this scenario? I'm SURE I'm just missing one stupid point, but I won't take offense to be called out on it, if it works!