I have Poser 5.0 and MAX 4.2. I just got the upgrade for the poser plugin to go from Poser Pro to Poser 5.0. The installation has been a little difficult. You have to go to their website to get it authorized. I eventually got it registered but in the response, I was supposed to get an authorization file as an attachment. I didn't; just some words where a file name should have been. Has anyone else had problems?