It wont work since our MU has a game guard which uses a Windows driver to function, and Wine doesn't support drivers yet, and probably wont in the near future. I'm also running Ubuntu as my main OS and I've looked everywhere for a workaround but haven't found anything, and honestly I've given up on it. Your only option is using VirtualBox and running Windows XP with it, but the performance is going to be way lower than usual and you'll need at least 2GB of RAM and a decent processor.