Diego, if cannot something understand, try the magic with Google.com :-)
Read it again im wrote for every GPU, not every GPU core !! should disable one CPU core....... Understand it ? so if you have 4 core/8thread CPU and 1 - ONE GPU then disable 2 cores on CPU as have on the image posted here......
BUT, the quadro 4000 is not so very speedy, so you get not so much speedup. If im remember Q4000 are some Nvida 4xx series GPU. Think so that Nvidia 560Ti is so fast as one 8+core CPU...... speedup is clearly to see there.....