I am a software developer and installer creator. I have ten years of experience. My main line of work is creating installers in Windows, MAC OS and Linux. Furthermore, I create robust and professional installers. The installer will also maintain version control and have a built-in uninstaller. I can create the DMG installers for you. I assume you want one installer for under MAC OS version 10.7 and the other for equal to and above MAC OS version 10.7. It will automatically run after installation and also at startup. I rest-assure that I will complete the work on time and deliver you the completed work to your satisfaction. Please send me a message so we can discuss further. The price has to be $150. The reason is it requires some work to create the installer. Also if $30 then I will only get about $15. That is not enough.