MovetoGroove,
It sounds like you want to have two power plans for your monitor, one that is always on for when you're using Band-in-a-Box and another for when your doing other computer things.
Windows power plans can do that.
+++ HERE +++ is a Microsoft document with the steps to create a new power plan and what you can change in a power plan.
From your description change Turn off display in 0 minutes and save the new plan.