Hi @ivanmonterosso!
Currently the best way of doing this kind of “preloading” is using SnapShots.
Depending your “use-case”, the new feature:
Map external events to Active layer/channel:
included in the latest Software Update:
could help you.
If you truly need to change the snapshot with 0 delay, then you may think in using 2 zynthians 
Kind Regards
P.S: Please, don’t forget to send some video of your “live”