Massive users creation in kolab

[Alessio Cecchi]

Hello,

i need to migrate an old mail server, with the users in etc/passwd, to a new 
kolab installation.

The users are about 500~. I can't add manually from the kolab webadmin.

What procedure can i use? I'm not interesting, for now, in information about 
Telefono, Department etc ... but only e-mail address and password.

A command line utility will be usefull!

Thanks
-- 
Alessio Cecchi is:
@ ILS -> http://www.linux.it/~alessice/
Assistenza Sistemi GNU/Linux -> http://www.cecchi.biz/
@ PLUG -> Presidente, http://www.prato.linux.it