Use 2 x 4's and drive them into the ground. Then put pants and shoes over them. You can drill holes into the shoes to get them to fit over the stakes (don't use boots with a steel shank). Jam the pumpkins over the 2 x 4 and position a stuffed shirt. Cool.
When I am not carving pumpkins, I am a successful entrepreneur. This year I launched a new brand of bulletproof vests. You can see it at BulletSafe.com. It is a pretty big deal too. It offers great protection and only costs $299.