Creating OVF template

Hi,

I am new to this group and here is my first question.

I have requirement that I need to export the VM as ovf template and give it to my customer.This VM is having Centos with my product installed on it. I have following requirements.

All the services part of my product whould automaticall gets started after importing and powering on this ovf template

Should be downgradable ( From ESXi 5.0 -> Esx4.x version), Not sure its possible.

Please help me with this,

Thanks in advance,

Siva