Did this to a VR V6 some time ago, but cheated a little with the wiring. Created our own relay circuit which ran both fans, and used the existing thermo fan wiring as the trigger switch for the new relay – did the job well.
Been wrestling with the image tags for the last 20 minutes on a thread I put up in the How To section, and I still cannot get them to render. Checked the tags, even got the images to show in the post editor, but it just displays a wall of text??