[Samba] How to control TEMP directory

[Howard Miller]

This is a slight rework of my last question but should be clearer. 
 
My samba installation appears to be trying to use /root/tmp as its temp directory. This is 
useless as when logged in as a user the system has no access to the temp directory and so 
nothing works. How do I pursaude Samba to use /tmp as the temp dir. I am running Samba 
3 on a Mandrake system. 
 
Thanks