I dont know. There is more than 1 way to apply a boot skin. I am just going by what i read. I can not comment on why you would use it for development and previewing and not implementatoin. Because i am not you. I have seen wierder things done. People just done like having 3rd party applications like that installed so they hack XP to apply the boot skins natively.
Maybe next time when someone asks a simple question you can answer it nicely and avoid this long drawn out arguement.
Just for your satisfaction go here:
Stardock - Your Edge In Software - BootSkin
Sicne they created it they will be able to answer your question more easily.