[horde] Help w/ hooks

[Ben Davis]

I think I need a little help on getting hooks to work.  Here's my problem: 

I have a special setup for creating users & groups.  Although I can 
still authenticate through normal LDAP authentication,  my users and 
groups need to be created and edited using special perl scripts on my 
server.

I've looked through horde/config/hooks.php  and I can't seem to figure 
out or understand what hooks I need to use for this.   I don't think I 
need to user preauthenticate or postauthenticate because authentication 
works as normal. Also, I don't allow users to "sign up" so  I'm not sure 
if I should use the preprocess hook either.

If anyone can clue me in here I'd greatly appreciate it!