[Samba] smb.conf syntax

[eme at ch4os.com]

Greetings,

When a new file is created it's permissions need to be RWX for all
users, as this a lock file is created, edited and deleted after each
session... First User on App Creates the File, all users are editing,
and the last one off deletes... (Paradox Database)

Is this config correct for this scenario?

[specworks]
browseable = yes
comment = SpecWorks Data
path = /home/specworks
writeable = yes
valid users = user1 user2 user3 user4
security mask = 0777
force security mode = 0
directory security mask = 0777
force directory security mode = 0

Do I need a Force User or anything else to accomplish this??
Users are all members of SPECWORKS group...


TIA