Samba Winbind for QNX

Hello All,
Has anyone successfully authenticated a login to a qnx box with a Windows
2000/2003 Active Directory Server?

I am aware that Winbind for Samba for Linux will do this task, but cannot
find a similar facility for QNX. I have just purchased 6.3.

Can someone also please point me to the latest samba download that will
work with 6.3?

Thank you in advance