Ron, standalone means you don't have to buy anything except the relevant program to use it. Textures for posette or the standard P4 clothes are stand alone because everything you need to use the item is included when you buy Poser 4. Most props are standalone - the geometry is included in the .pp2 file for most. Lights and cameras for Poser would be standalones. MAT poses, anything for Victoria or Michael - these are add-ons because they require a purchase in addition to Poser itself. It's just an attempt to stop people downloading freestuff items they can't possibly use.