[Samba] winbind AIX

["Info"]

I have installed Samba (from Binary) 3.0.25a on AIX 5.3
I'm trying to configure Winbind
I believe I need to copy winbind file to /usr/lib/security and modify
usr/lib/security/methods.cfg with ;-
"add WINBIND:
         programs=/usr/lib/security/WINBIND........."

nmbd, smbd and winbindd all running

My problem is I cannot find a file called winbind on my system ?

Any help appreciated

Selwyn