Ok, but theres other props... such as 3DS files (made in 3D Studio MAX). To load them is slightly different. I also suspect this is the question you are really asking. To load a 3DS prop (or many other props from other programs), go to File > Import. From there you see a bunch of choices... the most common you will use is either Wavefront OBJ or 3D Studio. From there, locate your file, click OK, and your prop shall appear. it will mostly likely be very misproportioned to your figure, you just have to scale it down, then relocate it, using the Editing Tools and dials. Taking the example of the gun, say you want to put it in their hand, but you dont want the character to let go of the gun when they move their arm. Select the gun, then go Figure > Conform To. From there, you will need to select the figure number that is the person (usually Figure 1, but you can find out by looking at the bottom left corner of your working canvas), then hit OK. Voila!