setTextContainerInset with different values for left and right

FROM : Ferhat Ayaz
DATE : Fri Apr 18 17:44:38 2008

Hi,

how would I go about setting NSTextView up so its insets are dx1 from 
the left and dx2  from the right side?
I guess setTextContainerInset: will set for both left and right the 
same value (dx1 = dx2).

Thanks,

Ferhat