Rigging my Creature

Here is a file i need help rigging correctly because i cant get it right. I need to be able to move the head in one, the neck, arms, flipper, and tail going to the back flipper. Might have to use vertex color or groups but just download, fix, and upload and alot of thanks to whom ever does im helping with an open game project at http://talesofkalenor.com/forum. Its gonna be for transportation. Texture would be nice and better aswell. Change anything but just dont change it completely and credit will be given and you get paid when i do.

http://www.mediafire.com/?yyz7iummyz2