Ok, I know it's not exactly an Ubuntu-related idea, but I think it's important.
Actually, when a user installs a program in Wine, only this user has the autorisation to access the program, meaning that if two or more persons want to access the software, they must share one user account, or install the program for each user, resulting in a lost of disk space (especially when it comes to Office or Photoshop).
I propose a installation mode, which should use sudo, and could create another fake C: drive somewhere in /, so that the programs can be installed for the whole system.
Of course, it should still be possible to install programs only for one user, with the actual way of installation.
Wine would then check in the user virtual C drive for programs, and PolicyKit could be used (if possible to integrate it in Wine) for launching system-wide programs.
Not in sudo mode, of course, just an authentication process (cause it's localized in the main directory tree).
Another solution could be to make the virtual C drives or some parts of it (like the folder containing the program) accessible to other users via an authentication process or a sharing thing.
