Adding more Custom Fields

Adding more Custom Fields

Hi,

I have a few questions:
  1. Is it possible to add User.Role (something like ${User.Role}) custom field?
  2. Is it possible to add some kind of a custom picture for each user (for example an image of a person's hand-written signature)?
  3. Is it possible to add User.Signature custom field which will contain data from the user's Signature field?
Looking forward for your help.