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#= (x43121@1)3 3 5 5 4 3
B= (x2444x@1)2 2 4 4 4 2

D (xx0232@1)                          C# (x43121@1)
I know you're creeping, I can see it from my shadow
B (x2444x@1)                     C#Wanna (x43121@1)jump up in my Lamborghini Gallardo? 
D (xx0232@1)                        C#Maybe (x43121@1)go to my place, and jus kick it like Taebo
B (x2444x@1)                        C#And (x43121@1)possibly bend you over, look back and watch me...
Dsmack (xx0232@1)that, all on the floor,
C#smack (x43121@1)that, give me some more,
Bsmack (x2444x@1)that, 'till you get sore
C#smack (x43121@1)that, oooh.
Dsmack (xx0232@1)that, all on the floor,
C#smack (x43121@1)that, give me some more,
Bsmack (x2444x@1)that, 'till you get sore,
C#smack (x43121@1)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#= (x43121@1)3 3 5 5 4 3
B= (x2444x@1)2 2 4 4 4 2

Peace out, 
Love,
Lucoi xxx