Sphene Community Tools

well..
using profile_edit_init_form you can register a signal to modify the form (ie. display additional fields) before it is displayed to the user ..

if you want to add additional settings to a user profile you would have to listen to all three fields ... profile_edit_init_form to add your form field, profile_edit_save_form to save it once it was submitted and profile_display to actually display it ..

i would suggest if you are really interested into adding additional user profile fields to the SCT mechanism you take a look at e.g. sphene/sphboard/models.py how it adds the forum specific settings (e.g. the signature) to the profile settings page.. (or the sphene/community/models.py which adds most other fields)

since the code is a bit undocumented just ask if anything (specific) is unclear and i'll try to explain everything the best way i can :)

well ... this is a django problem :) basically the one which is registered first. is called first (as far as i understand it)
so if you register a signal in models.py the one mentioned first in INSTALLED_APPS will be the first to get the signal.. (but the others will get it too obviously)