Topics on frontpage

I know the question is already been asked but after reading this forum for 2 hours, I still can’t find the answer (maybe due to my lack of knowledge in php).

i thought I knew some, but I can’t seem to get just cat_id=1 on the frontpage, without showing any other (sub)directories.

i assume the answer is short, but if somebody could give it… please…

I looked at the conditionals for including a file but I don’t know which get command to give to show only cat_id=1

I know include isn’t the correct one, but I don’t which is.

<?php
if (is_category(1)) {
include(TEMPLATEPATH . ‘/home.php’);
} else {
include(TEMPLATEPATH . ‘/single1.php’);
}
?>