Here are a couple of threads that might help you. You may wish to also do an advanced search for "walking". This topic has been discussed many times so I'm sure you'll be able to find several more threads.

• http://board.flashkit.com/board/show...hreadid=286237
• http://board.flashkit.com/board/show...hreadid=240046
• http://board.flashkit.com/board/show...hreadid=236429

Jerry has a figure walking for download at his site http://www.myswish.net

Willem at http://www.flashguns.com also has a few walking figure downloads.