how to get category description to be meta description

[discover]

i want the description i enter for each category to be the description used for the meta description
how do i do this please?

[fjean]

in templates/header.tpl

<meta http-equiv="Content-Type" content="text/html; charset=utf8" />
Content visible to registered users only.
<meta name="keywords" content=" ">
<meta name="robots" content="index,follow">
<meta name="author" content="Joe Pink">

[discover]

excellent
thanks thanks

[fjean]

your welcome and good luck