Hi,
For CentOS you can find rpm packages at the Dag Wieers website
for phpmyadmin:
http://dag.wieers.com/rpm/packages/phpmyadmin/
After downloading the package for your distro (you can use the
el5 package) install it using:
# rpm -ivh phpmyadmin-2.11.5-1.el5.rf.noarch.rpm
Best regards.
(I think it would be better if you start new threads for each
different question)