Hi ,
The Virtualizor team has released the following templates for KVM :
CentOS 6.2 x86
CentOS 6.2 x86_64
Ubuntu 10.04 x86
Ubuntu 10.04 x86_64
You can enable the templates from Admin Panel-> OS Templates-> Template Browser.
Select the centos-6.2-x86.tar.gz & centos-6.2-x86_64.tar.gz and click on save settings.