Go to the dosbox website, do a search for it.
The dosbox website has a tutorial for installing.
You may have to run the QFG install program in dosbox to install the game.
Then run dosbox again to play the game.
Lets say the game is installedl in C:\QFG.
You have to mount that directory in dosbox. Command is
mount c c:\cfg
you should get a z :
Should get C:
change directory to the game with cd\qfg
you should get c:\cfg
than all you need to do is type the name of the game exe. type CFG
The game should start.
Remember to install the game first but just run the install progam.
After you stop running the game you will be back in dos. Just type
exit to exit back to windows.