Digital BW, The Print

Can anyone tell me how one uses the Manual paper slot in the rear of
the 2200 for thick paper when you are printing with QTR/OSX. In the
instructions which come with the printer it says,"You cannot print on
thick paper in the Manual feed slot when you're printing with
Macintosh OSX Applications" Can this be true? There must be some way
to set up the boarders, etc. What is the procedure? I've ask before 
with no response. If an answer has been given previously please point 
me to the post.
Thanks

John H