Now, the sung bit should go something like this (in theory).  I say in theory, 
because the chords coincide with the notes sung, so should work.  Sounds pretty cool to me =D.

D = 10 12 12 11 10 10  (Or just traditional 0 0 0 2 3 2)
C# = 3 3 5 5 4 3
B = 2 2 4 4 4 2

D                            C#  
I know you're creeping, I can see it from my shadow
B                       C#
Wanna jump up in my Lamborghini Gallardo? 
D                          C#
Maybe go to my place, and jus kick it like Taebo
B                          C#
And possibly bend you over, look back and watch me...
D
smack that, all on the floor,
C#
smack that, give me some more,
B
smack that, 'till you get sore
C#
smack that, oooh.
D
smack that, all on the floor,
C#
smack that, give me some more,
B
smack that, 'till you get sore,
C#
smack that, oooh. 

And you can continue this through the rapping bits, I guess.  Bar chords are best, 
but there are only three so it's pretty easy.

D = 10 12 12 11 10 10  (Or just traditional 0 0 0 2 3 2)
C# = 3 3 5 5 4 3
B = 2 2 4 4 4 2

Peace out, 
Love,
Lucoi xxx