I found a "CD patch" that seems to manually uncompress the files (see links below) on a fan infocom page:
http://www.csd.uwo.ca/Infocom/games.html
http://www.csd.uwo.ca/Infocom/Download/RTZCD12.EXE
However, I still cannot get Zork to play. When I run RTZ.bat, it says "No sound driver resident".
I am on XP with SB Live! When setting up install.exe, I've tried SB, SB Pro, and SB 16 settings, and cannot get past the "No sound driver resident message".
Help appreciated figuring this out!