Some users have asked for a link list of sibling/neighbour directories next to the thumbnails of a certain directory. Here is a small script that produces just this. Paste it inside the index.htt file of some skin.

<%
  // Make links to sibling directories
  File parentDir = imageDirectory.getParentFile();
  File[] files = engine.listFiles(parentDir, true, programDirectory);
  for (File f : files) {
    if (f.isDirectory()) {
      if (f.equals(imageDirectory))
        out.println("<b>" + f.getName() + "</b>");
      else out.println("<a target=\"_top\" href=\"../" +
       engine.encode(f.getName() + "/index.html") + "\">" + f.getName() + "</a>");
    }
  }
%>

Try adding this first (untested)

<%
  import se.datadosen.util.*;
  String getTitle(File dir) {
    File propsFile = new File(dir, "meta.properties");
    if (propsFile.exists()) {
      Properties props = IO.readPropertyFile(propsFile);
      String newTitle = props.get("title");
      if (newTitle != null) return newTitle;
    }
    return dir.getName();
  }
%>

Now you should be able to replace the f.getName() call with getTitle(f)

Yes, replace imageDirectory.getParentFile() by rootImageDirectory

If you are using bluplusplus you can use this in index.htt to create a list of top level folders.

For example, if you have a folder structure like

top
2001
lots of subfolders and pictures
2002
lots of subfolders and pictures
2003
lots of subfolders and pictures
2004
lots of subfolders and pictures

Create a top level index.html customized for you contain links to 2001/index.html, ... 2004/index.html.

Invoke Jalbum 4 times building 2001, 2002, 2003, 2004.
This allows you to only build the folders that have changed (or in my case, since Jalbum would run out of memory before rebuilding all 25,000 pictures, invoke Jalbum on only a subset of pictures).

Add the code below right after the normal top navigation bar, before the graphics.

Now bluplusplus has 2 naviagation bars at the top.
The normal one and a new one list all of the sibling albums one level above your album.

<table class="topbar" width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td align="left" nowrap>
<span class="bpppath">
 Jump To &bull; 
<%
  File myparentDir = rootImageDirectory.getParentFile();
  File[] files = engine.listFiles(myparentDir, true, programDirectory);
  for (File f : files) {
    if (f.isDirectory()) {
      if (f.equals(imageDirectory))
        out.println("<b>" + f.getName() + "</b> &bull;");
      else out.println("<a class=\"path\" target=\"_top\" href=\"../" + "$rootPath" + "/" + engine.encode(f.getName() + "/index.html") + "\">" + f.getName() + "</a> &bull;");
    }
  }
%>