Capitalize words without capitalized words

Hello everybody,

I am searching for a solution for my problem.

Sometimes in a filename or tag there is a word (artist) (title) with 2 or more capitalized letters.
When I use the action all the words will be replaced by small letters and only the first one stays capitalized.
Such as TANK will become Tank or M.A.R.R.S. becomes M.a.r.r.s.

Is there a solution that such words stay as they are and the rest will be capitalized as I want it to be?

I hope someone can help me.

Thanks in advance.
Mike.

see the help

and look for the description of $caps2()