I've been patient since P5 was first released hoping that eventually they'd get the hair room working, but I've finally given up. It has never worked for me. No matter how simple the hair is, if I turn on collisions and then calculate dynamics, the program freezes up and I have to reboot the whole damn computer. I have plenty of RAM (over 1 G) and a pretty fast processor (1.8 MHz P4), so its not my system. I've been extremely happy with P5 with the exception of the #$%^& Hair Room. If they don't get it fixed in P6, I'm going back to crayons!! There, I've had my rant, now I'm going to bed.