Not sure I'd classify it as "very difficult" to change your real-name post-install; however, you have to be root to do it:
- System>Administration>Users and Groups
- double-click on account you wish to change
- enter new Real Name
- click OK
The decision to requite root access to change the real name makes sense in any multi-user context, to reduce opportunities for masquarading.
--ctyler 01:36, 19 November 2010 (UTC)