I've been lookig for a hack like this since I saw SPF.
Thanks FireFly.
I just add some templates for it to show also the number of post in each category (needed if you want to set to 1 the depth of your forums and justify the prize you want they to pay to be anounced there).
I just test it on my test forum:
http://www.dondepuedo.com/prueba/
As soon as I finish my exams I will put it on the main forums (
www.dondepuedo.com/foro)
Thanks again.
PS: Please, excuse my English (I'm from Spain)