Another trick, you can get Poser to write a pose file for a prop. Parent the prop(s) to a figure, save a pose using 'Select Subset' to select only the prop(s), use 'Include Morph Targets' if desired. The resulting pose will use "prop propName_1" so it will only work on props parented to a figure, unless you edit it to use "actor propName_1".

There may be situations where you want to use poses on a prop but you don't want to have to load a character into a scene. You can use "MinFig" available in the Free Stuff. It is a figure that consists of only an invisible BODY actor, it is a very small file size abuot 5KB. You can parent a prop(s) to MinFig then save MinFig back to a figure pallet eg as "MyFigure", the next time you load MyFigure the prop(s) will load with it, and you will be able to save or apply poses for it in Poser at any time, and without needing to edit the pose files (unless you want to exclude some part) as the prop is already parented to a figure no special syntax is needed.

There are other advantages to using MinFig. It you have a group of props, locking  MinFig will lock all the props, hiding the Body actor of MinFig will hide all the props, deleting MinFig will delete all the props parented to it. MinFig can also help to overcome gimball lock, those situations where one axis of rotation is lost to a prop.