Think I have answered my own question here: McAfee KnowledgeBase - How to automatically bypass preboot using the Autoboot User account
Although, if there is anything else I need to be aware of, please feel free to chime in.
Here's a question regarding autoboot - does or there is a way to set an expiration time for the autoboot feature with 5.2.12? There doesn't appear to be, but I am wondering if that can be accomplished via a script for instance?
I have never tested but it may be possible to just use the valid until option for the autoboot user to invalidate the user on a specific day.