Although there are only a few basic methods on how to prepare bird skins, almost every large museum has a unique signature on how they prepare specimens. Collected here are various videos, websites, and PDFs showing alternate ways to prepare birds.
Videos: Louisiana State Universite Museum of Natural Science - Specimen Preparation (MOV)
Smithsonian Museum Bird Skin & Partial Skeleton Prep - Roadrunner - part 1 Smithsonian Museum Bird Skin & Partial Skeleton Prep - Roadrunner - part 2 Smithsonian Museum Bird Skin & Partial Skeleton Prep - Roadrunner - part 3