Update: I seem to have it working now, at least on the 2 GB card. I can't quite seem to find the feature in which I can take pictures at long intervals (5-10 seconds apart) for an unlimited amount of time (i.e. until card fills). This will have to be done remotely, that is, I need to be able to trigger the sequence once and then let it go for an hour or so on its own...
Thanks again!