Problems with samba 2.2.2 and 2.2.1a

[Ariel Mella]

i have a PDC samba configured. all works ok, profiles, logon scripts,
permissions etc.
but when i go to a windoze workstation and configure the Access control list
of users in the properties of network neighbourhood i set my domain to
obtain a list of users for acl the local (in the windoze) file sharing.
when i go to share a directory i go to Add to retrieve the list of users and
groups from my pdc,
1) only the first 100 users are retrieved, all users can logon, but in the
list only appear the first 100(i vae 800 users logging in to my server)
2) only 2 groups are in the list and i want to set groups for users because
seting an local acl user per user is a bit ugly.

any idea?
thx for all