Sometimes it’s just that easy. Our good friends at Parallels have developed a special Mass Deploy package, available on their site. When you control-click on it and select Browse Contents you will see a license.txt. You can paste your license into the license.txt file and then put your virtual machine into the root of the package. Once complete, you can push this package out at will. Additionally, you can edit the postflight shell script in the Resources directory, throwing your own commands at the tail end of the file, adding more virtual machines, customizing settings, etc. Good luck.