why not getting one of the original bike models from em4 (scene -> objects -> street ... i guess), unlock the file and then add a newly modeled person to it?
parts of this new model could be animated, like legs and body.
of course that would be lots of work, but definitely possible!
I thought about that but I don't understand how to animate objects. I'm trying to get a man to hold a videocamera but everytime I select the camera and exit the editor, the man goes back to "idle". I must be missing a step.