download cpu-z and open it.
leave it on the cpu page
now open it again and leave it on the memory tab. so u have cpu-z open twice.
now take a screen grab (print page)
upload it to a image hosting site like flickr or imageshack.
then if u notice in the top of the box, when u writing a reply, u will see a little tab for 'Insert Image', copy the link into this.
thats it