You can also assign a UniqueIdentifier by casting from a VarBinary data type.
Select Cast(Cast(1 as VarBinary(16)) as UniqueIdentifier)
Play around with the VarBinary size and the integer being cast and see if you can figure out how it gets translated into the UniqueIdentifier!
PeteKI have CDO. It's like OCD but all the letters are in alphabetical order... as they should be.