DOS Game

Hello, I am new here (to the forums, but not Spriter's Resource).

I've been wanting to rip the sprites and character portraits from a game called Ravenloft: Strahd's Possession. I extracted the ISO to get .DAT, .BAT, and other similar file types. Obviously, none of these are going to give me what I want.

How would I get the images I want?

Thank you.