To make your own models, you have to have 3dsMax 4 or 5 (no higher) and some good tutorials Um, I found a good website with tutorials and a free 3d program it's link is:
No clue how to use them, I can import them into map, but how do I get the right pathing? And there's no tile for the part at which people would stand, as seen in the screenshot? W/e, there should be a tutorial on this, but I digress.