I thought it might be that you were using Poser 8. There was a quantum leap between 8 and 9 in regard to IDL speed. If you go to 9, you can also use EZSkin2, which will boost the reality of your renders a whole bunch of notches.

With Poser 8, you are dealing with older technology, and you are just not going to get the performance out of it that the advances of the last couple of years have given us.

Wish I could help.

It IS upgrade time.