Step 2c: use nodefamilies' url handler

[deprecated by 2a]
If the population of a content type is restricted to 1, as it is the case for nodeprofiles,
nodefamily provides a unique URL for adding/editing nodes of this type:

One can go
to 'nodefamily/CONTENT_TYPE' for adding/editing your node of the content type or administrators can go to
to 'nodefamily/CONTENT_TYPE/USER_ID' to edit nodes of this type from other users.

Replace CONTENT_TYPE with the machine readable name of your content type. You can find the machine readable name "admin/content/types" in the column "type".
Administrators have to replace USER_ID by the user id of the user, whose profile should be edited.

Use the menu module to create a menu item for this URL. There your users can create and update their profiles. The first time they fill out the form, a new node will be created, then the next times the created node will be updated.

The described way is only applicable to simple nodeprofiles, which consist of one type. If you want to build a more complex profile, try the solution 2b, which makes use of the pageroute module.