I've found some forum threads that have links to dll files that you're supposed to use to switch between the two, but when I first tried using them, I was still unable to connect to Nasomi and was then also unable to play retail, and I ended up having to uninstall everything from Nasomi and retail, then reinstall everything on retail, including updates, to get it to work again.

I really want to give Nasomi a shot, but not at the expense of being able to play retail.

What all do you have to do, exactly, to switch between them?