When you've got all your individual props loaded and grouped, and parented the way that that you want them... like a table for example... you've got a box for the top and 1 for each leg. Go to File->Export->Wavefront Obj. You'll get a hierarchy window that will show you everything in the scene... uncheck everything to begin with by clicking the box next to "Universe" all the other x's should go away... then select each part of the table that you want be one prop. I always uncheck all of the option boxes in the pop up window that comes up after you've selected the parts and hit okay. That will export your table as a single prop. Then go to File->Import->Wavefront Obj. and reimport your table prop... it will now be one piece... you can then save it to your Props directory and use it just like any old table! :) You can even give away your nifty table.pp2 file in freestuff if you'd like! Hope that helps! K-