lots of good stuff
here...
as for your errors, it would appear that gmax did not install correctly
or you moved it after installation
or you installed it to a different location to the default...
by default, I think it wants c:\gmax, if you put it somewhere else, the config file may not be automatically adjusted to reflect the correct paths... if you look in the configuration menu... (I am not in front of my gmax machine at the minute, so I'm not sure the exact menu path), but there is a section that allows you to setup the paths to things... just make sure that they reflect the path structure you have used to install gmax...
ps. while your desktop is nice, next time you might just want to crop the screenshot down to the dialog box! I think I wore my mousewheel out scrolling down!
