OK, here's a picture: http://iluvtocnc.googlepages.com/IMG_0762.JPG
Does it look correct? I used a 470 Ohm 1% for Rgain, so the total gain should be (1+2*R1/Rgain)*R3/R2 = 4270. I haven't checked if that's true, since I don't have anything that can measure in the mV range the sensor outputs.
What would have helped me would be a tutorial on how to do proper data acquisition. When I get all my stuff working, I'll write up something about amplifiers and A2Ds, but I'm going to need some help, since I don't know much about either!