Unable to install opManager as a linux service.

I am using Ubuntu 8.04.2.

I tried following these instructions: http://support.opmanager.com/sd/AddSolution.sd?solID=1825

I reached step number 4 to find that I got the error: chkconfig: command not found.

I tried to search how to download that , and found that you could do it using some rpm command. But when I tried using rpm command, it said : rpm: command not found.

So then I came across this link: http://ubuntuforums.org/archive/index.php/t-20583.html where it gave the following steps to perform:

If you actually want the chkconfig command in ubuntu, do the following:

$ apt-get install libnewt0.51
$ ln -s /usr/lib/libnewt.so.0.51 /usr/lib/libnewt.so.0.50
$ wget http://www.tuxx-home.at/projects/chkconfig-for-debian/chkconfig_1.2.24d-1_i386.deb
$ dpkg --force-all -i chkconfig_1.2.24d-1_i386.deb

I followed them and then returned back to complete the last step from the first link:

chkconfig --add opmanager

Running this command gave me the error:

root@ipvmhinprototype:/etc/init.d# chkconfig --add opmanager
chkconfig: error while loading shared libraries: libnewt.so.0.50: cannot open shared object file: No such file or directory

I am not sure how to get opManager to be added as a linux service. Any help would be appreciated.