sudo guru needed

[Albert Wagner]

I have downloaded and burned a cd from Cincom that is an installation 
disk for Smalltalk. In the root directory of the cd (/media/cdrom0/) 
there exists a shell (sh) file named installUnix which must be run. It 
is owned by root and in group root with permissions -r-xr-xr-x.  In a 
terminal I get:

# /media/cdrom0
# ./installUnix
bash: ./installUnix: /bin/sh: bad interpreter: Permission denied
# /media/cdrom0
# sudo ./installUnix
sudo: unable to execute ./installUnix: Permission denied

I get the same in a terminal invoked so:

# sudo gnome-terminal
Password:
# /media/cdrom0
# ./installUnix
bash: ./installUnix: /bin/sh: bad interpreter: Permission denied
# /media/cdrom0
# whoami
root

Do I have to activate root with a password in order to run this shell?