divide a part into equal volumes

Can anyone think of a way to take a part such as a
valve cover gasket and divide it into 4,8 or any number
of equal volumetric parts?We need to do this quite often
for moulding gaskets to find the injection and venting locations.
We ussually find the centerline of the part along the cavity
and bring it into our old CAD software and divide the c-line into
equal segments then apply the dimensions back into Solidworks.
This is usually close enough.For some reason Solidworks will not
do this for us.I have tried sketch patterns,reference points and
anything else I could think of,the c-line is ussualy made up of
a comdination of about 200 splines,arcs and lines or more.
Volumetrically dividing would be better,but either method willwork.
Here is a pic of a typical gasketSolidworksParts And Features