[Pharo-project] Managing images: new files vs. new folder

Hello all, How do you handle a new version of Pharo? Obvious choices are to unzip in the same directory with the previous image, and to create an image-specific directory. I have succesfully put various images in one folder in the past, but I worry about MC stepping on itself in the then common package cache. There are some advantages to that approach, but if MC gets into trouble, it's a bad idea. Bill