If you are using P7 there is the universal Pose converter built in. Or might want to look at puppet master if using P6.

I make most of my poses doing one of two things loading an hi res square into the scene then loading an image of the pose I want or take one of the default poses that is close or near to want I want and tweak it.  95% of my poses I have created are for my own use so I don't consider the second part cheating.

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