Particles to face centers

Hi,
how can we put an object to face center in particle system ?
i am asking this because if we assign an object as rendering type it is placed randomly on the face. if you didn’t got the idea, check the image
now its like this
http://img822.imageshack.us/i/particleactually.png
and i want it like this
http://img195.imageshack.us/i/particlelikethis.png
( the last one obtained using Duplifaces )

after a lot of headache i found out, i don’t know if this is a right solution, anyway its goes like this, In the emission pannel
select ‘FACES’
take out RANDOM and EVEN
put ‘JitterAmount’ to 1
try changing ‘Particles/Face’
if you are almost center on all faces, stop changing ‘Particle/Face value’
and tweak ‘JitterAmoun’ slightly to make almost to center

AMOUNT value should be exactly the number of faces on the object
Example: http://img217.imageshack.us/f/monkeydo.jpg/

Good work, and thanks for the info!