I do not think there are any emulators for any of the PPC-versions that
lets you run anything you do not have the source-code to.
The reason for the emulator you can download from MS is to make it
possible for a developer to test their application without having access to all the available hardware-types.
There is a crude way of controlling/displaying your PPC-screen via activesync and a 3rd party software. This demands that you have your PPC-device connected to your computer in order to get this thing working.
You will then have a PPC-screen on your PC-screen that will give you access to the PPC. This is fairly easy to setup if you have a bluetooth GPS.
The above solution is not a good one but it should work.
Why don't you have a look at Mapmonkey using destinator SDK?