i was bored so i replaced one of the icon folders in Vista Menu with some select icons from the Black White 2 Gloss icon theme.
You can do what i did and replace an existing folder with the new one or you can try and get the preferences to recognize the new folder.
vista start menu: http://gnome-look.org/content/show.php/Vista+Start+Menu+for+Gnome+Panel?content=71425
black-white 2 gloss:http://gnome-look.org/content/show.php/black-white+2+Gloss?content=72621
i tried to take a screenshot but the menu disappears once the prnt scrn button is pressed. sorry. trust me it looks wicked good especially if the rest of your system uses the BW icons.