I can't comment on MacIntosh OS,
but if you run WIndows XP, then you can easily set it in "Program Access and Defaults"
You access that either in your ALl Programs menu, or you may display it on your Starrt menu.
If you don't see it, then simply open Start & right click to set Properties / Customize Button / Advanced Tab / & check the PRogram Access & Defaults box. Then it will display so that you can use it.
Again, this is for Windows XP, I don't know about very overpriced MacIntoshes.