More tag in ‘Apatuhalpa’ theme not working

Hi!
I have issues with the more tag (which i can’t get to work at all) and am desperatley looking for help!

I tried to divide a post, but no luck. I’m using the theme “Apatuhalpa”. Here’s the code that I found within the loop.

<!– Post Body Copy –>
<div class=”post-bodycopy clearfix”>
<?php if ((is_home() && $bfa_ata_excerpts_home == “Full Posts”) OR
(is_category() && $bfa_ata_excerpts_category == “Full Posts”) OR
(is_date() && $bfa_ata_excerpts_archive == “Full Posts”) OR
(is_tag() && $bfa_ata_excerpts_tag == “Full Posts”) OR
(is_search() && $bfa_ata_excerpts_search == “Full Posts”) OR
(is_author() && $bfa_ata_excerpts_author == “Full Posts”) OR
is_single() OR
is_page() OR (is_home() AND !is_paged() AND $postcount <= $bfa_ata_full_posts_homepage) ) {
$bfa_ata_more_tag_final = str_replace(“%post-title%”, the_title(”, ”, false), $bfa_ata_more_tag);
the_content(bfa_escape($bfa_ata_more_tag_final));
} else {
the_excerpt();
} ?>
</div>

I would like to be able to cut any post whenever I want and am curious to know how to
a) either insert an image instead of any “read more” text and
b) customize the text associated with the more tag.

I am VERY new to all this, so if you could explain rather detailed and “un-techy” (where exactly do I need to change what, pabasically….), I would very much (!!) appreciate that!

Thanks.
Jutta