Actually it's pretty easy to get Amberstar working. Just start your DOSBOX (no config needed), mount your Amberstar Directory, like this
"mount c C:\Games\Amberstar"
(if that's the directory you installed Amberstar to) and then switch there with
Then you can simply start the game via
"AMBERSTA.EXE" (don't even need to write .EXE)
and there you go. I havn't configured anything still everything works just fine. I'm pretty sure you can change the config, so the directory gets mounted when you start the DOSBOX, so you don't have to it manually every time you start the game. Hope you have a blast.