I also have both 3.1 and 4 installed and each one works fine. Odyssey, if you have 4.02 and not the 4.02b, be sure to grab up the 4.02b. The earlier release of the 4.02 created problems related to the OpenGL that the 4.02b doesn't. Beck, have you written E-on support with the details of your PZ3 import problems? They really are interested in everyone being able to enjoy the program working as it should.