jQuery & zrssfeed with menu, where do I put the snippet=false and header=false

jQuery & zrssfeed with menu, where do I put the snippet=false and
header=false

I've been using this code:
$(document).ready(function() {
setRSSFeed('#menu');
$('#menu').change(function() {
setRSSFeed(this);
});
function setRSSFeed(obj) {
var feedurl = $('option:selected', obj).val();
if (feedurl) {
$('#feed').rssfeed(feedurl);
}
}
});
and although I've tried (almost) everything I can't seem to be able to
find where to place the following:
snippet=false
header=false
so that I can remove the header and get the pictures from the rss feeds
I'm using.