I had a complete nightmare trying to get a successful installation of Vue 4. Unfortunately the information on e-ons site stating that 4.01 patch is unnecessary prior to 4.0b patch is incorrect. Under w2k, I found that you need to install the 4.01 patch first, and then patch it with the 4.02b patch to stop getting errors. However...it still crashes and dies when I import a pz3 that has BUM files. High Res skin textures use BUM files... I just hope that they (E-On) get their act together soon. NOte also Vue 3.1 (complete version) cannot be installed with a COMPLETE version of vue 4. If one is an upgrade, I am sure the cohabitation would be acceptable. I have no upgrade, so I had no choice but to uninstall my previous copy of 3.1 I have to say this......I am NOT AMUSED by this entire install nightmare AT ALL. I only hope that this will all have been worth it in the end.