hopefully you can see in the picture, there is a switch below the lense that they install. Flick it to "N" for normal, then the camera works as a webcam, flick to "L" for Long exposure and the exposure time can be run by a computer via the added printer cable.
I use imaging software Desire, that Matt at Telescope and Astronomy sent me to control the number of shots and exposure of each. I have added to my webserver at
http://precons.com/iis/downloads/toucam/ if you need a copy.