Ok...found this on the Pterodon PMT forum....
Open regedit and browse to HKEY_LOCAL_MACHINE\SOFTWARE\Pterodon\Vietcong\Version Info
Locate the key named 'Patch Version'. Double click on it.
Change the value to 82 (130 in decimal). Install the editor. Go back to that same key and change it to 8d (141 in decimal).
Now it had to do with installing the 1.35 map editor in a 1.41 patched game....
However...if someone played with it to say it was vrs 1.50 then you could join the Pterodon server and download all the Fist Alpha maps.
Is my simple ida worth playing with??