THere is a nice mod called "advanced topics" (http://custom.simplemachines.org/mods/index.php?mod=1069), is it possible to put it in a block in PortaMX? How difficult it wil be to do that? Can anyone give me a hint? Thank you very much.

Not directly, I'm afraid.
First off, the mod is not compatible with SMF 2.0, it needs to be re-written for it. (I understood you have 2.0, or are you referring to a forum on 1.1.10 ?).
Then, there may be another way to achieve a similar (though not identical) result, which is to use SSI, ssi_recentTopics() or ssi_recentPosts() specifically.

Untested example: (in a PHP block)

$topics = ssi_recentTopics(10, null, null, 'array');

echo "
   <table>";
foreach ($topics as $topic)
{
  echo "
<tr>
<td class=\"windowbg\">${topic['icon']} ${topic['link']}</td>
<td class=\"windowbg\">${topic['views']}</td>
<td class=\"windowbg\">{$topic['board']['link']}</td>
<td class=\"windowbg\">${topic['time']}</td>
 </tr>";
}
echo '</table>';


WOW, thank you so much! Being busy, will back tonight to try.