[dosraider]

Dosbox 0.72.
Unzipped all files in folder eco2.
No problems at all, runs fine when inputting sierra or rain.

So maybe you could give some details?
Like:
Dosbox version?
Your mount lines?
How you try to run the game?
If you runned install? (If you did: delete your folder and start over from scratch, you probably screwed the configuration file).

As how to launch 'all' the games: look for a *.bat, *.exe.
You can search them by inputting
dir *.exe and dir *.bat
whilst in the game folder in dosbox. usually a start, go, or something looking as the game name or related to.
There isn't a 'magical' input, look and you'll find.

As most games on AB are ready to run in dosbox you'd better don't run install or setup. Not all, but most will run directly.