hej,
If you have a valid maintenance agreement with PTC you can download alot of postprocessors from their website. I think I recall there are a few that would suite your needs.
They can be found here:
http://www.ptc.com/cs/cs_22/howto/ncgp4903/ncgp4903.htm
http://www.ptc.com/cs/cs_26/howto/ncgp2646/ncgp2646.htm
If you dont have maintenance, you can always pm me.
/J