Create a move_rope entity and place it where you want your rope to start, and enter a number for "slack" (around 120 or less is usually good). Then create a keyframe_rope entity where you want it to end and call it something (like "rope_1"...anything works). Now, go back to the move_rope and set its "next keyframe" to whatever the name of your keyframe_rope is.
As for the posters, simply resize them in the 2D view like you would resize a brush.