This is a direct link to Apple's guide.
http://developer.apple.com/documentation/AppleScript/Conceptual/AppleScriptLangGuide/
I searched around and found that Parallels is not a "scriptable" application. (I could be wrong, but I couldn't get the dictionary to open.) I then found out that Parallels will automatically suspend the OS on closing. (Which is a preference setting in Parallels.)
I have had some success with Applescript just in closing and opening the application, but this wouldn't open the specific OS that I needed.
FYI, The Applescript command, "tell application "Parallels Desktop" to quit" (without quotes) will shut down Parallels. Any open OS's will suspend. You can open Parallels with the command "launch "parallels Desktop"", but I still have to choose the OS I want to load.
I then turned to Automator and I was able to open the OS I needed. I think this will work. All I need to do now is test that my OS will suspend properly. (Since it is Small Business Server running Exchange it might not.)
Anyway, if suspend works I am going to suspend my OS, start a super duper backup of the drive a minute or two later, and then launch the OS again after the backup should be completed. This way If anything happens to the server I can restore the backup in moments from another computer.
Thanks for the help! I'll let you know if it works like I am hoping.