The very first thread in this forum should help you.
Here's a direct link.
http://forum.thegamecreators.com/?m=forum_view&t=62338&b=24
MAKO is the one to go into detail on this one.
He made an nice swat character.
Here's one thread on it.
http://forum.thegamecreators.com/?m=forum_view&t=64126&b=24
I think this was the first thread, and it goes a little into explaining how he did it.
Again, I've never done it, so I'm only guessing, but..
I think sticking to the original animations would be best.
An assigment of a characters Animations are in the chracter's FPE with START/STOP Frames.
A list of all of the Default Animation Actions are listed in the PDF Manual on Page 88.
Hope this helps.
Whatever you can imagine, you can animate. --- Walt Disney
All too easy. --- Darth Vader
Just do it! --- Nike