Well, a reason of not include the plugins in the executables, is the size, if you make several programs or games that for example use the oggvorbis.hwp in each program or game you add 1.5 Mb extra, the best option is use the plugin installed in Libs:Holywood, in this case the Chrysalis pack supposes an important save of MB, because these MB are saved in the iso and in the hosting service and in the band width to download it also to save money with the Internet traffic in the hostings.