Setting up Repository:
http://dag.wieers.com is the biggest rpm repository for RHEL, CentOS for all versions. To enable repository run following command. The following command directly install rpm from http://dag.wieers.com site.
rpm -Uhv http://apt.sw.be/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0.3.6-1.el5.rf.i386.rpm
This rpm will add necessary files in our repository configuration and can be viewed at /etc/yum.repos.d/rpmforge.repo
Use yum command to install mytop
yum -y install mytop
Now; time to Run MyTop and it is simple
write mytop on the command line and there you go!