It's pretty simple really. You need a heat source (lamps), at least 3 large rubbermaid containers with lids, a half dozen or so smaller (like sandwich) rubbermaid containers without lids, some peat moss or similar soil, and something to feed crickets.
I will throw up some detailed pictures tonight, but for now you can see this from my terrarium album:
http://soundspawn.com/image_server/a/images/terrarium/IMG_1719.JPG
Those are 60 quart, you can see the peat moss in the smaller containers (keep it very moist). I started with very little egg crate but acquired more as I went. That's a three bulb terrarium light sitting over 1-1/2 containers - found it at petco on sale. To the left is a third container with a dedicated ceramic light and no live crickets, just peat moss containers. Basically you raise them in the middle and right container (once you get a good offset you'll have subadult and adult in one and nymphs in the other) and after leaving a peat moss container in with the adults for a week you move it to incubation on the left.
You'll know the crickets are ready to breed when you hear chirping, and they only live a week or two past that - which is about the right timing for the incubators to hatch and move in to the old container. Also the lights supply a good amount of heat, you want 80's (high 80s is great, sometimes the incubator hits mid 90s, just keep it high humidity and it's great).
For food I pour oats around and regularly cycle in a container of fresh produce. We throw some of the jello type water (Flukers brand) for the younger guys because they will drown if you give them much standing water... the adults drink the moisture from the peat moss. I'm happy to answer any questions you may have
