It's not hard. I just did it in 5 minutes to answer this question, with a targa in my shed. You pop the metal clips loose on both long sides. That leaves it still held on by the moldings down each short side. You kind of need to go up or down with it. You'll need to start one side at a time to get past the lip of the molding. Once both sides have moved, you can slide it right out. I only went halfway, so not positive if it will hang up at the end, but I doubt it will.
BTW....My spare targa is red, but it has a blue headliner. Let me know if you have problems. I can take pictures if needed. And, if you screw up and need another headliner, I will sell this top whole or in part.
