If you don't know already, the Cave Diggers Yahoo Group may be your best resource:
LINK.
Another option is to check out the commercially available kits. One from
On Rope 1 uses Hilti caps. I couldn't find it on their website, but I didn't look real hard. It may not be listed. You may have to call for info.
BMS also has a kit that doesn't require a hammer to set it off. Much safer method.
But the best way to learn, since you are in Greenbrier County, is get with some cavers that are doing it already and learn from them. Nothing like on the job training. There are lots of diggers in that neck of the woods. The Cave Diggers Yahoo Group is the best way to get in touch with them.
Good luck. And if you get a chance, take some pics of you leads and update us on your progress.