The Anywhere Map manual is the only manual that I could find on their site that showed how the hardware was being connected.
http://www.controlvision.com/pages/awm_manual.htm
Since thats the only source on their website, heres a few questions that hopefully will help us answer your question.
Are you connecting the Ipaq and GPS with the "Integration Module" or with a Ipaq standard serial synch cable and null modem adapter to a GPS serial cable, or a modified Ipaq cable that connects directly to a gps?
As per the manual for Anywhere Map, it stated in the Hardware requirements that it required a "RS-232 Port(usually the docking cradle port)", if so then there is a possibility that Anywhere Map at least might work with the AXIM.
I was looking over their hardware accessories and found this..
AW161 & AW161-D
Universal DC Adapter
Product Summary:
This allows the iPAQ or Dell Axim to receive power from the aircraft power port, while using the Sentinel GPS to run the Anywhere Map. An adapter is required for use with the 38xx series iPAQ.
Product Availability:
Currently In Stock
AW161-D - For Dell Axim
<$32.95>
I just thought that it was interesting. It's the only thing I found relating to a Axim. I had not found a cigarette lighter adapter for the Axim that connects to the power input instead of the sync port. I may have to buy one of these.
Pics of the setup would be nice. They aren't providing enough info for my taste.