Hi Shak, No ideas why your custom install is not working correctly. I have tried to duplicate your issues here without success. Are you using vmware or similar to create your custom install? I have tested with VMware and all works fine. <{POST_SNAPBACK}> Felix, I'm using Virtual PC trial edition. I am not quite sure why Its not installing perfectly.. maybe I need to delete all registry settings before the install? Before using your technique I had it install firefox alone and it worked, but no extensions or settings so I uninstalled it, deleted the program files folder for it, and the folder in my docs / settings folder. Maybe there were some registry settings that I needed to delete? If you want I can upload my install and you can check it out, see if it works alright with you. Thanks, Shak