About the sound - the soundcards on your computer are probably simply not compatible with any old standards that Ms-Dos had back then for the soundcards, probably also just lacking the Dos drivers for the soundcards you have, which would result in at least bad soundquality if a not-recognized soundcard at all. As for Windows ME - don't even try to run the Dos games in it just like that. Download VDMSound
here and see if that helps.
About Redneck Rampage - forget it. I had all kinds of problems with that game myself, crashing every once in a time being the more harmless one.