Tklpatch-ree is a project mainly written in Shell, it's free.
Ruby Enterprise Edition Appliance
h3. Description:
p. Ruby Enterprise Edition Appliance Turnkey Patch
h3. Usage
$git clone http://github.com/towerhe/tklpatch-ree.git
$cd tklpatch-ree
$git submodule init
$git submodule update
$sudo tklpatch turnkey-core-11.1-lucid-x86.iso .