Folders - read-only

I have copied all my internet favourites folders in from Windows XP (IE7). I
didn't use a password in XP and still don't in Vista.

Now, I can't organise or add-to any of the folders in Vista. It says they
are read-only.

When I display the properties of the folders, they have a green square
(mixed content) in the read-only tick-box. I switch it off and accept the
prompt which says that it will apply to files and sub-folders.

But when I go to use them they are still read-only, and when I look at their
properties, they are unchanged - still flagged with mixed content. And I
still can't organise or add to them.

What can I do to make them useable again?

thanks...

M