Outlook 2003 - Removing or Modifying an LDAP directory using a PRF

[GS]

Apologies if this is asked alot, but is there any way to modify an existing
LDAP directory within Outlook 2003 via a PRF file. More specifically,
changing the name of the directory and the search base. I've been hunting
around for a while and can only find ways of adding new directories, when I
really only want to change the two existing ones.