Wow what amazing work on this - I've hammered this version for the past 20 minutes opening probably every table/version they have and it didn't even stutter, going from fx3, visual pinball and back to zaccaria, just no issues whatsoever.
I just went through and launched pretty much every table in Zaccaria from PBX. Every single one of them started so I really think the latest script is the good to go. I was able to trim down the 15 second delay before key presses are sent on my system down to 10 seconds so my load time improved but that will be more of an end-user tuning others will need to play with on their system.
Hope it works for everyone!