There are times PP slows down a little, but 30-40 lights are no problem. The script that tells you there aren't any lights is the Lightworkshop that looks for lights with names as created by the Sky&Bounce workshops , with the aid of the analyzer you can change the naming in existing lightsets, once that's done the Lightworkshop won't complain when you have an "old" lightset loaded when you run that script. I've looked at the MK Scripts, tried them too, they crash Poser 9 times out of 10 here. Apart from that have you contacted Paul Bos to see if he has an idea why?