Combining folders

I'm sure this has been covered, but I can't find it. Vista x64 has two Program Files folders (Program Files, and Program Files (x86). I want to create a virtual folder than will list the total contents of both folders (Yes - I play in there) but can't figure it out.

I can get both folders listed and choose one, but I'd rather have the contents of both in a single lister.

Any ideas?

Do you need the view to be "live" or would a snapshot do?

You could use Flat View along with some filters to get the "live" view, though I suspect it would be a little fiddly to set up.

If a snapshot would do, you could make a button which does a "Find" on the two folders and then shows you the results as a file collection.