Try opening up the animation toolbar at the bottom of Poser, set that to 5 frames before the final (frame 25 if using 30 frames), and then do all the morphing and posing.

The figure will still be in the default pose and shape in frame 1, and the dynamic clothing will work just find.

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If you're joking that's just cruel, but if you're being sarcastic, that's even worse.