Here is a sortable Abyss-look-a-like Directory Listing made with php.
Works also with virtual directories.
To install:
Copy the code and save it as a .php -file to your server folder.
Go to Abyss console > Confugure > Directory Listing > From Script >
Browse and point out the file. Press OK and Restart.
All the best,
Vesku

<?php

// *********************************************************************
// *  Sortable Directory Listing script for Abyss Web Server           *
// *  Lists Directories first.                                         *
// *  by Vesku 29/7/2007                                               *
// *  Works also with virtual directories.                             *
// *                                                                   *
// *********************************************************************
error_reporting(0);

function sizeformat($size)
{
	if($size<1024)
    {
        return $size." bytes";
    }
    else if($size<(1024*1024))
    {
        $size=round($size/1024,1);
        return $size." KB";
    }
    else if($size<(1024*1024*1024))
    {
        $size=round($size/(1024*1024),1);
        return $size." MB";
    }
    else
    {
        $size=round($size/(1024*1024*1024),1);
        return $size." GB";
    }
}

function dateformat($date)
{
    $separate = split('[- :]', $date);
    $year = $separate[0];
    $month = $separate[1];
    $day = $separate[2];
    $hour = $separate[3]+3; //+timezone
    $minute = $separate[4];
    $second = $separate[5];
    $date = mktime($hour,$minute,$second,$month,$day,$year);
    $date = date("d.m.Y H:i", $date);
    return $date;
}

// Reading Abyss dirlist

$lines = explode("\n", $_POST['files']);
  for ($i=0; $i < count($lines); $i++)  {

$array = explode("\t", $lines[$i]);
			if ($array[1] == "../") {
				$dotdot = '1';
				$dotdotdate = $array[3];}

$id[] = $i;
		$name[] = $array[0];
		$url[] = $array[1];
		$size[] = $array[2];
		$date[] = $array[3];
		$type[] = $array[4];

if ($type[$i] == "") {$type[$i] = "Directory";}
  }

$dir = array($name, $url, $size, $date, $type, $id);

// Sorting section

$nameth = 'S=N&O=A';
	$sizeth = 'S=S&O=A';
	$dateth = 'S=D&O=A';
	$mimeth = 'S=T&O=A';

switch ($_GET['S']) {
		case 'N':
			switch ($_GET['O']) {
				case 'A':
					array_multisort($dir[5], SORT_REGULAR, SORT_ASC, $dir[1], $dir[0], $dir[4], $dir[3], $dir[2]);
					$nameth = "S=N&O=D";
					break;
				case 'D':
					array_multisort($dir[5], SORT_REGULAR, SORT_DESC, $dir[1], $dir[0], $dir[4], $dir[3], $dir[2]);
					break;
			}
			break;
		case 'S':
			switch ($_GET['O']) {
				case 'A':
					array_multisort($dir[2], SORT_NUMERIC, SORT_ASC, $dir[5], $dir[1], $dir[0], $dir[4], $dir[3]);
					$sizeth = "S=S&O=D";
					break;
				case 'D':
					array_multisort($dir[2], SORT_NUMERIC, SORT_DESC, $dir[5], $dir[1], $dir[0], $dir[4], $dir[3]);
					break;
			}
			break;
		case 'D':
			switch ($_GET['O']) {
				case 'A':
					array_multisort($dir[3], SORT_REGULAR, SORT_ASC, $dir[5], $dir[1], $dir[0], $dir[4], $dir[2]);
					$dateth = "S=D&O=D";
					break;
				case 'D':
					array_multisort($dir[3], SORT_REGULAR, SORT_DESC, $dir[5], $dir[1], $dir[0], $dir[4], $dir[2]);
					break;
			}
			break;
		case 'T':
			switch ($_GET['O']) {
				case 'A':
					array_multisort($dir[4], SORT_REGULAR, SORT_ASC, $dir[5], $dir[1], $dir[0], $dir[3], $dir[2]);
					$mimeth = "S=T&O=D";
					break;
				case 'D':
					array_multisort($dir[4], SORT_REGULAR, SORT_DESC, $dir[5], $dir[1], $dir[0], $dir[3], $dir[2]);
					break;
			}
			break;
		default:
			$nameth = 'S=N&O=D';
			break;
	}

// HTML section

?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML>
<HEAD>
<META HTTP-EQUIV='Content-Type' CONTENT='text/html; charset=utf-8'>
<TITLE>Index of <?php echo rawurldecode($_POST['path']); ?></TITLE>
<style type="text/css">
TABLE {font-family: monospace;
font-size: smaller;}
TD {padding-right: 1em;}
</style>
</HEAD>
<BODY><H2>Index of <?php echo rawurldecode($_POST['path']); ?></H2>
<HR>
<TABLE BORDER="0">
<?php
echo "<TR><TH><a href=\"?$nameth\">Name</a></TH><TH><a href=\"?$sizeth\">Size</a></TH><TH><a href=\"?$dateth\">Date</a></TH><TH><a href=\"?$mimeth\">MIME Type</a></TH></TR>";

/*
echo "<PRE>";
print_r($dir);
echo "</PRE>";
*/

// Printing dotdotdir

if ($dotdot == "1") {
	echo '<TR><TD><A HREF="../">[Parent Directory]</A></TD><TD NOWRAP ALIGN="RIGHT"><DIR></TD><TD NOWRAP>';
	echo dateformat($dotdotdate).'</TD><TD NOWRAP>Directory</TD></TR>'."\n";
	}

// Printing Directories

for($i=0;$i<count($lines);$i++) {

if ($dir[1][$i] != "../") {
		  if ($dir[4][$i] == "Directory") {
			echo '<TR><TD><A HREF="'.$dir[1][$i].'">['.str_replace('/', '', $dir[0][$i]).']</A></TD><TD NOWRAP ALIGN="RIGHT">';
			echo "<DIR>";
			echo '</TD><TD NOWRAP>'.dateformat($dir[3][$i]).'</TD><TD NOWRAP>';
			echo $dir[4][$i];
			echo '</TD></TR>'."\n";
		  }
		}
	}

// Printing Files

for($i=0;$i<count($lines);$i++) {

if ($dir[4][$i] != "Directory") {
			echo '<TR><TD><A HREF="'.$dir[1][$i].'">'.$dir[0][$i].'</A></TD><TD NOWRAP ALIGN="RIGHT">';
			echo sizeformat($dir[2][$i]);
			echo '</TD><TD NOWRAP>'.dateformat($dir[3][$i]).'</TD><TD NOWRAP>';
			echo $dir[4][$i];
			echo '</TD></TR>'."\n";
		}
	}

?>
</TABLE>
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