# rpm -Uhv http://apt.sw.be/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0.5.2-2.el5.rf.i386.rpm

# wget http://packages.sw.be/perl-Net-SSLeay/perl-Net-SSLeay-1.36-1.el5.rfx.i386.rpm

# rpm -ivh perl-Net-SSLeay-1.36-1.el5.rfx.i386.rpm 

  ...

# yum install memcached

  ... 

  Installed:
    memcached.i386 0:1.4.5-1.el5.rf                                               

  Dependency Installed:
    compat-libevent-11a.i386 0:3.2.1-1.el5.rf                                     
    perl-AnyEvent.noarch 0:5.240-1.el5.rf                                         
    perl-EV.i386 0:3.9-1.el5.rf                                                   
    perl-Guard.i386 0:1.021-1.el5.rf                                              
    perl-JSON.noarch 0:2.50-1.el5.rf                                              
    perl-JSON-XS.i386 0:2.30-1.el5.rf                                             
    perl-TermReadKey.i386 0:2.30-3.el5.rf                                         
    perl-YAML.noarch 0:0.72-1.el5.rf                                              
    perl-common-sense.i386 0:3.0-1.el5.rf                                         

  Complete!

# memcached -h

  memcached 1.4.5
 
  ...

# yum install php-pecl-memcache

  ...

# service httpd restart

  Stopping httpd: [  OK  ]
  Starting httpd: [  OK  ]

# service memcached status

  memcached is stopped

# service memcached start

  Starting Distributed memory caching (memcached): [  OK  ]

# ps -e | grep memcached

  2076 ? 00:00:00 memcached