Problem with Read Only Flag on Files

Hi Guys,

So I have all my CVS settings in Intellij 7.02 to "Use read-only flag for not edited files". This seemed OK when I checked out all the files from CVS, however when I moved to another CVS branch and back all the "Read Only Status" of the files were removed now I seem to have no way of making them all read only again apart from to check out the entire project again from CVS is this correct?

I guess I am looking for a way to do this from Intellij rather than having to go into my file system and mark them as read only there.......!

Thanks up front for any help.

Tony Burgess