I need to update my novell client from 4.90 sp2 patch d to 4.91 sp3 pak

Also need to remove the Zenworks application launcher and novell workstation
manager from previous versioin of zen part of novell client.

Now I have new version of zen agent i no longer need them.

I have try nciman.exe to create a unattand.txt file and run

setupnw.exe /u:newlexnt.txt but it does not remove the zen works and
workstation manager.
it updates the client but nothing gets removed...

any idea? Help