Im looking at making the cake on the link below.
Does anyone know how i would do the high school musical curtain stage at the back?
I use the corrugated plastic tuffboards for my cake circles, so I'd cut one of those and cover it with fondant, then decorate it with gumpaste curtains. I'd attach it to the cake with skewers that went into the openings in the corrugated board, then stuck into the cake. You could probably do the same thing with corrugated cardboard wrapped in waxed paper. That might keep the board from softening up.