If you use pbSetSelfSwitch(X,"A",true), being X the number of the event that you want to activate, you can start one event while another is working. Example --> pbSetSelfSwitch(40,"A",true)
This script activates the A switch of that event, so be sure that the things that you want are in the page activated with the A switch.
I don't know if this is what you asked, but is a very useful method.