Adding or deleting items?

[<kend@xanoptix.com>]

Hiya.  I'm a little confused as to how to add and delete... well, I'm not
even sure of the correct nomenclature, so let me give an example: groups. 
I have, say, a group "IT", thusly:

# gIT, US
dn: cn=gIT, c=US
objectClass: posixGroup
objectClass: top
cn: gIT
gidNumber: 567
memberUid: kend
memberUid: ullmanl
memberUid: tom

Is there any way to add or delete members singly?  Or must I take the
entry, either add or subtract the user, and then re-import it with
ldapmodify?

Thanks,

Ken D'Ambrosio
Sr. SysAdmin,
Xanoptix, Inc.