I've installed a minimal install of cent65 added epel puppet and the foreman latest release repos.

[root@foreman ~]# rpm -qa | grep release
epel-release-5-4.noarch
foreman-release-1.4.1-2.el6.noarch
puppetlabs-release-6-10.noarch
centos-release-6-5.el6.centos.11.2.x86_64

[root@foreman ~]# yum install foreman-installer foreman -y
throws lots of dependency issues.

if I add the 1.3 release repo and get package conflicts:
Transaction Check Error:
file /usr/bin/ruby193-rake conflicts between attempted installs of ruby193-ruby-wrapper-0.0.2-4.el6.noarch and ruby193-rubygem-rake-0.9.2.2-29.el6.noarch
file /usr/bin/ruby193-ruby conflicts between attempted installs of ruby193-ruby-1.9.3.327-29.el6.x86_64 and ruby193-ruby-wrapper-0.0.2-4.el6.noarch

So I install just ruby 1.9
[root@foreman ~]# yum install ruby193-ruby -y

Then I can finish the foreman
[root@foreman ~]# yum install foreman-installer foreman -y

Now when I run the installer:
[root@foreman ~]# foreman-installer --foreman-proxy-dhcp true --foreman-proxy-dns true
I get a segmentation fault:

[ INFO 2014-02-25 16:11:42 main] /usr/lib/ruby/1.8/pathname.rb:287: [BUG] Segmentation fault
[ INFO 2014-02-25 16:11:42 main] ruby 1.8.7 (2011-06-30 patchlevel 352) [x86_64-linux]
[ INFO 2014-02-25 16:11:42 main]
[ INFO 2014-02-25 16:11:42 main] sh: line 1: 1696 Done echo '$kafo_config_file="/etc/foreman/foreman-installer.yaml" $kafo_add_progress=true include kafo_configure'
[ INFO 2014-02-25 16:11:42 main] 1697 Aborted | RUBYLIB=/usr/lib/ruby/gems/1.8/gems/kafo-0.3.16/lib/kafo/../..//modules: puppet apply --verbose --debug --trace --color=false --show_diff --detailed-exitcodes --modulepath /usr/share/foreman-installer/modules:/usr/lib/ruby/gems/1.8/gems/kafo-0.3.16/modules