Quick Solution
 

I installed dosbox 7.3 for vista and followed all commands on this tutor. The game I am wanting to play is "Dungeon Master".
I downloaded Dungeon Master in the "oldgames" file under my user name as described.
When I click on dosbox, the prompts come up with the c:.

I just need to know what to do next. where do I go from here to play Dungeon Master?

To further where I am. I am at the Dosbox start page and Type in dir and get 3 files. One that say DMASTER. I assume this is what i want.
Doing some reading around, i typed cd dmaster and DMASTER came up. So then i place "dir" in front of DMASTER and I get a list of items.

DATA,ANIM,DM,EGA,END,FIRES,IBMIO,INSTALL EXE, SELECTOR,STATS EXE, SWOOSH, TANDY, TITLE, & VGA.

SO after the DMASTER I typed INSTALL, (DMASTER>INSTALL)
and it says Dungeon Master install Program, Version 1.0
Type the letter of the drive to install to (for example c,d, etc.)

SO everything I put in says error except for the "C" drive. When i put the "C" drive in, its says to choose another one. So this is where I am. Any help from here?

Try to enter DM instead of install.

That did it. Thanks a million!