I'd say use a shop vac, suck the buggers up, leave the vac running and grab a tin of roach spray, and spray that down the hose just as you switch off the vac (though it's unlikely that a running vac would ignite the propellant gasses, it's best not to introduce that risk), the air should still flow enough to suck it into the bin and coat the critters nicely, then pull off the hose, spray a bit more into the vac and tightly plug up the hole with something that they can't chew through, take the vac outdoors and then tip it out into the nearest wastebin (or pull out and chuck out the bag if it's got one fitted)...
I'm just glad we don't have roach issues here in the UK like you guys do, though we do have them in places, they're not as common as things like woodlice, which are fairly docile insects, but not something you want to step on bare-footed... :S
