Wow Binos, you've thought of complications I didn't even consider. In my ignorance, I merely downloaded it, installed it and put a shortcut on my desktop and even toolbar, so now I can just choose whichever one I want. If I'm posting, I use IE, just to get more room in the composing box, as mentioned above. If there are complications with having both on then I guess I need to know about them before they catch me out.