• Download http://boastology.com/pages/download.php The BMashine plugin
• insert the code from this .php file into your web page at the place where you need the summary
• modify the link to the RSS page in the beginning

$url="http://www.laka.lv/tiki/tiki-articles_rss.php?ver=2";

• modify the text outputed in the for cycle in the beginning of the script to output everything you need. I used this:

for($i=1;$i<=count($myar[TITLE]);$i++) {
$title=iconv("UTF-8", "ISO-8859-13", $myar[TITLE][$i+1]); //convert the codepage (I need this)
$description=iconv("UTF-8", "ISO-8859-13", $myar[DESCRIPTION][$i]);
$link=$myar[LINK][$i];
$pubDate=$myar[PUBDATE][$i];
if($pubDate) { // Only show enteries with a publication date
$pubDate=strftime( "%d.%m.%Y"  ,strtotime($pubDate)); //Convert the date to something sensible
echo <<<EOF
<p><b>$pubDate</b> - <a href="$link">$title</a><br>
$description</p>
EOF;
    }
}

• I also had to change this line

//$tags=array();
$tags=array("title", "link", "description", "pubDate");

• In Tiki 1.8 there is a bug: RSS streams conflict with gzip compressed pages, so disable this feature in General features pane. You may still use php or apache level gzipping.