Thanks for the info. I'll pull some demo versions and take a look.
I have the Compaq IPAQ 3670 to which I added the NEXPAK sleeve (with battery and dual card slots). Added the Transplant CF GPSr with WAAS turned on. I'm an IFR pilot waiting for my medical to renew (had blood clots into my lungs from surgery on a broken knee ). I've found the PocketFMS for pilots but it isn't fine grained enough for hunting the caches.
The GarmapCE with NMEAMon is an interesting pair (without waypoints). At least I can set the unit down and watch it wander around. After a few minutes it gives an idea of where the real "center" is located.
Thanks again!
--KG7JE