Create a folder anywhere and stick all the prototypes in it, then make it Locked.

Drag the aforementioned folder onto the Dock.

Drag the appropriate prototype onto any folder; it will copy because the parent folder is locked.

..

Art, screen captures, icons, photos, 3D, Escape Velocity, Quake, Smaug, etc.

From http://neil.chaosnet.org/media/create-new-mac/.