How To Modify Schemas

["Jason C. Leach" <jleach@ocis.net>]

hi,

So I'm creating a Contacts directory and I would like some changes made
to the LDAP Schema. For example I would like room for an alternate eMail
address as well as an addition or two of fields.

My question is how do I go about this?. Do I just copy an existing
definition for 'mail' call it 'altmail' and add it to the appropriate
object class? 

Is this even aloud in LDAP or is there a better way to make changes?

Thanks in advance,
j.