Problem with Layout ... Urgent

I'm working on a Cadence layout project and am facing the following
problem. I'm following the instructions from a reference manual to
creat a pmos pcell. The manual describes a pcell which expands upwards
in width but my pcell has to expand downwards. The stretch line has
been defined by me and that works. The problem lies in getting the
contacts to repeat. The commands in the manual (some of which I have
changed to suit my pcell) are as follows :

Stepping Distance : 1.5 (This is the stepping distance I rtequire for
my pcell)
Number of repetitions : fix(width-0.8)/pcStep (width is the stretch
parameter I have defined and I want a distance of 0.8 between the last
contact and the edge of the pdiff)
Dependent Stretch :
Adjustment to Stretch : ((fix(pcRepeatY)-1)*pcStepY)

What happens when I use these commands is that the pdiff stretches
downwards as defined but the repeated contacts are created upwards
resulting in the contacts lying outside the pmos. What modifications
should I make to these commands so that the contacts are created in
the downward direction too.

Thanks,
Ashish.