How can I setup different "environments" I want to create different environments on my mac, for example work 1, work 2, and at home. The environments have different icons in the doc, different desktop background images etc. Is that possible? I do not want to create different users, because some files are used in every environment.
In "Computer -> Users" there's a folder called "Shared Folders". You can put shared files for all users in there (including the iTunes library etc.). With fast user switching enabled it's very easy to handle multiple environments.