How to model curtains that open and close?

So I used the Stock -> Drape ->Curtain model in A3D to add all the parts of my stationary curtain (the part at the top, and the two side parts that don't move).

My question is, how do you model the main curtain in the middle that can open and close?

For reference my curtain opens and closes from the center. The reason I want to model it is that we have an extension that thrusts out in front of the stage, so sometimes the actors do scenes on the thrust with the curtain closed and we want to light the curtain itself (kind of like a cyc). Other times they are on stage and the curtain is open.

thanks

p.s. I'm still very new to EOS and A3D.

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