Some more info on the situation...
Moving the house is pretty much out, my parents aren't gonna go that far for ants. We aren't sure where exactly they are under the house, and neither me or my dad (the only two who would be doing the job) are planning on going under there to find out.
Pest control guy is also out-- my mom's a cheapskate. She also believes in wearing shoes when outdoors... sometimes i wonder if she was ever a kid...
I seriously doubt my parents would go for the diesel/kerosene/gasoline idea (they've got this thing about fire, which is understandable since my grandparents lost their house a few years ago from fire-- it was a lightning strike then, but still...). What I'm leaning towards is chemical or fairly non-hazardous (as in, won't explode or eat your fingers off) means of disposing of the little buggers.
Speaking of which, they don't have high hills-- pretty flat, in some medium-tall grass (yes, we need to mow... just moved in though and we don't have a lawnmower yet). Plus, there's too many of them to be able to easily harrass them.
What we tried (on a few hills before it ran out) was this brown powder stuff (don't know the exact name-- we got it from an Ace Hardware)-- you sprinkle it on the hill and then wet it down. not sure what's supposed to happen after that... i guess it's to kill them...
anyways, thanks for the suggestions and i'd like more...
It's a strange world. Let's keep it that way.