Cost me some time to figure out how to add the icon for your objects. Did read somewhere that it must be 64x64 pixels and the help file in BTB says only: "The only part XPacker cannot create is a small icon that is used to represent your model in BTB. A default jpeg file (128x128 pixels) is create with the same name as your object. Replace this file manually by making a screenshot of it in BTB, then crop and resize in an image editor of your choice." Still I wasn't able to add the object icon in an already existing Project. So what I did: Goto BTB\My Projects\Your Projectname\XPacks and unzip the Your Projectname.zip. When unzipped go to Your Projectname\Objects, here you see the default jpg's. Replace those files manually, by first resizing your original jpg's into 64x64 pixels. Delete the old zipper (maybe backup first) Zip the new 'Your Projectname' back into Your Projectname.zip (same name!) And done Hope this any helpfull.