perhaps you mean the DELL dock, that is a program that goes only with
Dells and is not a part of vista?
this one
http://gizmodo.com/5019768/dell-dock-puts-a-little-mac-os-x-into-vista-studio-laptops
I have seen it but it wont run on other non dell computers
but I can imagine that if you run it from the start> all programs menu
then it should have a way in the docks settings
if you cant find the icon
try typing dell or dock in the vista start menu search.. perhaps an icon
will appear...
you see this is not part of vista so not many will know what you are
asking