hi i want to use a usb microscope with GEM. with the macam driver installed, my macbook is able to get video from it on imovie, but i havent succeeded in forcing pix_video to get video from this cam instead of the built in isight. i have tried [dialog( but it only lets me select isight (and both DV Video and IIDC FireWire Video are grayed out). what other things should i try to make this work? thanks!