I haven't read thru the responses in this thread but I can tell you how to get rid of roaches! 🙂
Get you some Raid brand fumigators, settle for nothing else.... you will need to turn your smoke alarms off and be out of the house for at least 8 hours.
I recommend at least twice the number of fumigators recommended per square footage. I used to live on the beach next to a restaraunt so I know how to handle this kind of problem....
And after this I was roach free! 🙂
Sometimes you just gotta get nuclear with them little varmints, lol.