I've come up with a way to run the Mercalli V2 Fx from the Vegas timeline in a batch fashion. It involves a number of scripts inside of Vegas and also an external Autohotkey script for controlling the process. I've prepared a short YT Tutorial describing how it works. It's best viewed in 1080 fullscreen and can be found here:

I've tested it in V10, V12, and V13 on my Core i7 system and in V13 on an older Q6000 system and in V13 on a really old Core 2 Duo laptop which did require some timing changes.
It is still very much a work in progress. If you're interested in trying it out and providing some feedback and suggestions for improvement, here is the Dropbox link to the script files and installation guides.
https://www.dropbox.com/sh/j44yl1cubpvzhu0/AABKBxvG1nUHkpb3VpuwE-h8a?dl=0
I would suggest you also download the project test files which are the same ones used in the tutorial and try it on those before using your own materials.
Your feedback would be appreciated.
wwaag

I've tested it in V10, V12, and V13 on my Core i7 system and in V13 on an older Q6000 system and in V13 on a really old Core 2 Duo laptop which did require some timing changes.
It is still very much a work in progress. If you're interested in trying it out and providing some feedback and suggestions for improvement, here is the Dropbox link to the script files and installation guides.
https://www.dropbox.com/sh/j44yl1cubpvzhu0/AABKBxvG1nUHkpb3VpuwE-h8a?dl=0
I would suggest you also download the project test files which are the same ones used in the tutorial and try it on those before using your own materials.
Your feedback would be appreciated.
wwaag