Thumbnail size on main gallery page

Is it possible to change the size of the thumbnails, only on the main gallery page? Currently they are showing up as really tiny for me, and my client wants them to be much larger. Probably larger than the regular thumbnails in each category page. Anyone know how to do this?

I found the following code reference in administrator/components/com_rsgallery/config.rsgallery.php:

function getThumb($catid, $height = 0, $width = 0,$class = \"\"){
   global $database,$mosConfig_live_site, $mosConfig_absolute_path, $rsgConfig;
   //$imagepath = $rsgConfig->get( \'imagepath\' );
   //$thumbpath = $rsgConfig->get( \'thumbpath\' );

   $imgatt=\"\";
   if ($height>0)
      $imgatt.=\" height=\\\"$height\\\" \";
   if ($width>0)
      $imgatt.=\" width=\\\"$width\\\" \";
   if ($class> \"\")
      $imgatt.=\" class=\\\"$class\\\" \";
   else
      $imgatt.=\" class=\\\"RSgalthumb\\\" \";
   $database->setQuery(\"SELECT * FROM #__rsgallery as a, #__rsgalleryfiles as b WHERE a.id = b.gallery_id AND b.gallery_id = \'$catid\'\");
   $rows = $database->loadObjectList();
   if (!$rows)
      {
      $t_path = \"<img $imgatt src=\\\"\".$mosConfig_live_site.\"/components/com_rsgallery/images/no_pics.gif\\\" alt=\\\"No pictures in gallery\\\" border=\\\"1\\\" />\";
      }
   else
      {
      foreach ($rows as $row)
         {
         $t_path = \"<img $imgatt src=\\\"\".imgUtils::getImgThumb($row->name).\"\\\" alt=\\\"\\\" border=\\\"0\\\" />\";
         }
      }
   return $t_path;
   }

However, changing those to permanent values would be problematic when sometimes the dimensions are different, and I\'m not sure how to increase it dynamically. Thanks!