using PHP to define variables in a CSS

Greetings all.

I am currently creating a site that allows the user to choose a "theme" with thier personal settings. I have successfully been able to load all of the inline html graphics and items with php, but what I am trying to do now is perform the same functions with a stylesheet. I have a CSS page that i renamed .php and added

# styles.php
header("Content-Type: text/css");

to the top so that it still sees it as a css page ...

the only thing I can't figure out is how to make the page call the PHP page and use it as a CSS.

i have a database set up with all the variables, etc... just need to get this past piece working.

beow is the entire CSS page:

__________________________________________________

<?php
include("data.php");
mysql_select_db("courtad_NISP", $dbcnx2);
$themes = @mysql_query(" SELECT theme FROM Affiliate_Prefs Themes WHERE affiliate_id='".$_SESSION["Affiliate_ID"]."'");
$themerow = mysql_fetch_array($themes);
$styles = @mysql_query(" SELECT * FROM Themes WHERE theme_id='".$themerow[""]."' ");
$stylerow = mysql_fetch_array($styles);
# styles.php
header("Content-Type: text/css");
?>
.menuitem {
font-family: "Palatino Linotype";
line-height: 25px;
font-weight: bold;
background-image: url(<?PHP echo $stylerow["button"] ?>);
background-repeat: no-repeat;
background-position: center center;
font-size: 12px;

}
a:link {color: #<?PHP echo $stylerow["a_link"] ?>; text-decoration: none; }
a:active {color: #<?PHP echo $stylerow["a_active"] ?>; text-decoration: none; }
a:visited {color: #<?PHP echo $stylerow["a_visited"] ?>; text-decoration: none; }
a:hover {color: #<?PHP echo $stylerow["a_hover"] ?>; text-decoration: none; }
.THL {
background-image: url(<?PHP echo $stylerow["thl"] ?>);
background-repeat: no-repeat;
background-position: left top;
}
.THC {
background-color: #<?PHP echo $stylerow["thc"] ?>;
}
.THR {
background-image: url(<?PHP echo $stylerow["thr"] ?>);
background-repeat: no-repeat;
background-position: right top;
}
.TFL {
background-image: url(<?PHP echo $stylerow["tfl"] ?>);
background-repeat: no-repeat;
background-position: left top;
}
.TFC {
background-color: #<?PHP echo $stylerow["tfc"] ?>;
}
.TFR {
background-image: url(<?PHP echo $stylerow["tfr"] ?>);
background-repeat: no-repeat;
background-position: right top;
}
.TCL {
background-image: url(<?PHP echo $stylerow["tcl"] ?>);
background-repeat: repeat-y;
}
.TCR {
background-image: url(<?PHP echo $stylerow["tcr"] ?>);
background-repeat: repeat-y;
}

maybe u should separate the php that processes css stuff from the css and use the php script to write to the css file.