Building a new pc with motherboard KN9 SLI

Hi at the end of this mounth ill be getting £150 to finsh off of a pc i started.

So far i got a few things list below.

Mother Board - KN9 SLI
Memory(ram) - 2gb (cant rember the band etc)
Harddrive - 160gb i installed vista on this already.

I basicly have a tight budget of £150 and i have to finsh the pc.

It needs a good graphic card with directX 10,Sli Technology and shader 4.0, very inportant.
It needs a dual core processor.
It needs a dvd drive that can write to dvd-r

The parts must come from this site http://www.microdirect.co.uk
Its very tight buget but i think its possable.
please help me i not got much time these days to look things up.