Dunno if you sorted this since but if you mean you can not find the generic human/manakin model then it may be because you are creating projects based on a template that does not contain it. E.g. Empty Template.
Try using FPS Template maybe.
You don't really need the generic manakin model (or whatever you want to call it - the one with it's arms stretched out). All you need is the FPS controller script, but then you usually need to move some sounds and images into the right place if you have a bare project.
If you still have trouble get back to us with some further description if you can.
Is it just that you need to adjust for size of your image because image is placed according to top left corner so minus half the height and width of image to position?