It won't work. sh can't open the file apparently.
You need to make it executable, chmod +x whatever-script.sh . Damn i created a shell script some time ago that installed amikit on linux and osx, but sendfile swallowed it and now i cant find the latest version, perhaps i have it stuffed away somewhere but thats on my box, and hours drive away... (hm, found one in gmail, ill have to check it out before i re-re-reublish it, but if anyone has the Amikti-latest.sh that is around 41 kb please holler)
Any version of libgtk will do, you can also symlink a newer version to it, ln -s /usr/lib/libgtk-1.x.x.so /usr/lib/libgtk-1.2.0.sh
apt-cache search lbgtk
apt-get install libgtk-x-x-x