Poses don't have to be imported before they're used, you can simply load the poses. However, I don't understand what you mean by "so I can use it by changing actors and apply animations?". You can't use a pose to "change actors", that's what an appearance preset or look is for, and you can't use a pose to apply an animation, an animation is a different type of thing such as a Timeline animation.
Basics of loading poses:
If the poses are pose presets, you can load them via each person atom's Pose Presets tab. If they are legacy poses, you can load them via each person atom's Control & Physics 1 tab.
If you want to have something like a button click or other event trigger the poses to load on the male and female simultaneously, they need to be pose presets, not legacy poses. You can convert the legacy poses to pose presets by first loading the legacy poses as above, then saving new presets in the Pose Presets tab. Then, in some trigger panel such as a UIButton's button trigger, you can add an action where Receiver Atom is the person atom, Receiver is Pose Presets, and Receiver Target is Load Preset With Path with the pose preset file selected.
Hope that helps