This issue has come up more than once for various needs: We need to add Partner (rather than other), some people are just business contacts (more details would delight me more than "other"). The inability to edit these doesn't give our business control of the stages and doesn't make us happy and hinders our business process.
YES, we create custom properties to handle this, but it doesn't simplify our lives. Simply creates more fields that marketing and sales have to populate. Please help. Thank you.