Quote - You can send the .pz3 file, but the person would have to have [...]the [...] poses etc on their computer in order for the items to show when they open the .pz3 file on their computer.

Poses? Poses are saved inside the pz3. > Quote - A .pz3 file is not sending them any of the item files themselves.

That's generally speaking wrong. If external binary morphs are not disabled (so for any Poser version before 6 anyway) morphs (injected or not) would be inside the pz3 file (as already pointed out by ADP obove). A prop without external geometries would also be included. So a pz3 can well include parts of copyrighted material. Eg. sending a PZ3 containing a morphed Victoria 3 to someone would give them those morphs and that'd be a copyright violation...