Being totally newbie with Drupal (and btw will stay that way !) I search thoroughly on this web site for explanation on how to install that magic module, which by the way did work magnificiently with my situation, but I could'nt find any. Since I don't usually managed websites unless obligated, I'm kind of lost especially when it comes to a platform such as Drupal. But I did managed to find the folder /modules in which I downloaded the script and execute it. It then created a subfolder site_verify. So that went right. The only thing I did not know is where to place the google html file. Tried two locations which failed to validate with Google so I copied the file here and there trough the /www folder and it actually worked, but where it did worked, I have no clue :-)