uhm.. You can't do booleans inside Poser. And Poser doesn't always like booleans in the first place. Some import just fine, others import with invisible-until-rendertime-facets. Generally it's a good idea not to use booleans with Poser stuff.

But then again that would require some sort of modeler in the first place, which Poser is not. It's a program for posing and placing premade stuff :)

Just making it clear in case it wasn't obvious :) I've seen a few people thinking they could make models inside Poser. You can combine things out of primitives, Dr.Geep has shown us all how - but Poser isn't a modeler.

A good, and affordable modeler is Hexagon, sold at Daz3D. And of course there are free ones like WinGS and Blender.

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.