2
Here is the solution:
in wfdownloads_block_new.html the command
<img src="<{$download.screenshot}>" />
must be added;
in wfdownloads_top.php the line
$download['screenshot'] = XOOPS_URL . "/" . $xoopsModuleConfig['screenshots'] . "/" . $myrow['screenshot'];
must be added;
and the query must look like this:
$result = $xoopsDB->query("SELECT lid, cid, title, date, hits, screenshot FROM ..."