depends. Some cr2's & pp2's contain the required geometry info, some reference an external resource file (that's like all the files in your Geometry folder). You can look at the file in a text editor and see if it has a path to an external file. Some people will include an obj file along with a Poser prop, even though Poser doesn't need it, just so folks who don't own Poser can use the model in another app. Most figures use common geometry files that either came with Poser or are addons (like Vicky & Mike). You didn't mention why you were zipping (backup or distribution) but if you didn't build the obj file, its most likely improper to redistribute it. Just trying to say that if, for example, you are distributing a Victoria character, don't include the obj file.