So I was confused but I think I have figured most of it out now.
Here goes
Animated Backgrounds (Allows all settings grouped below it function)
Intersititial Backgrounds (loads the images in Hyperspin\Media\Main Menu\Images\Backgrounds\Interstitial between switching system)
Level 1 - 4 Backgrounds (Appiles different levels of animations to backgrounds as they fade in and out when switching. Higher level = better animation and higher CPU load)
Special Backgrounds (Plays Override Transitions in .flv format from Hyperspin\Media\Main Menu\Video\Override Transitions for .flv files that match system names you have in your Main Menu.xml)
or
Hyperspin\Media\Frontend\Video\Transitions for generic .flv files that play when no System Name specific one is found in above folder location
Themes Wait For Special (Themes load after Override Transition has played)
Animated Artworks (This applies animation of Artwork in png format that is contained in the "systemname".zip Theme located in Hyperspin\Media\Main Menu\Themes)
Level 1 & 2 Artworks (Im not sure on this one but guessing its either different levels of animations OR applies animations to more of the 4 theme artwork layers)