Most of it's pretty straight forward. The big thing is the board can't sit on top of the insert as is. You'll need to make some sort of step up for it to sit on.
I set the board right on top of the dividers. Seems to work fine. Probably isn't real great for the dividers, but in three weeks of play I see no discernible damage, and adding expansion card dividers in there will only spread out the stress even more.