form-validation depending on a checkbox

[eluser]sl3dg3hamm3r[/eluser]
I do store the rules in rule-groups in an external file, therefore I call them like

Code:

if ($this->form_validation->run('signup') == FALSE) { ...

Unfortunately, I can't chain/cascade different groups according to the manual I think, which would come real handy in here. Would be nice as an additional feature...