[Samba] smb.conf

[Gerald]

Hi all
My client want a shared folder so that only two people can access and 
write to it.
I added the following to my smb.conf

[private]
writeble = yes
guest ok = no
path = /home/samba/private
valid users = wendy, pierre
write list = wendy, pierre
force user = nobody

All i need yo do now is make the folder "private" to nobody. How would i 
go on by doing that and would this work.

Regards
Gerald