I checked it out, and that's actually part of Ccoa's Universal Message System (UMS), which you can find here:
http://www.mundorpgmaker.com/forum/scripts...gss/ums-pedido/Just scroll down and you should be able to find it on that website. Copy that script into a new entry of your RMXP project script list. On line 214, there should be a line that reads:
CODE
@skip_mode = WRITE_ALL
So if you want it back to default at any point in the game, use this code:
CODE
$game_system.skip_mode = false
Hope that helps