I thought I'd post a plugin tree I just hacked together here. It uses a javascript library and could be useful to someone.
I'm not posting the complete tree here since the page is about 1MB big.

As a little extra, below is some sample output from the graph package installer. Pablo's almost done with it :-)

::start here

Changing working dir to /tmp/swf_plugins.kUgtCe15592
Loading files... 
Template file: top_nets.inc
Source file: top_nets.php
Extracting files... 
etc/ossim/framework/panel/swf_plugin_templates/top_nets.inc
usr/share/ossim/www/graphs/top_nets.php
Checking PHP sintaxis (with lint [ see php -l ])
No syntax errors detected in etc/ossim/framework/panel/swf_plugin_templates/top_nets.inc
No syntax errors detected in usr/share/ossim/www/graphs/top_nets.php
PHP sintaxis Ok!
Checking template format: etc/ossim/framework/panel/swf_plugin_templates/top_nets.inc
Name Ok!
Homepage Ok!
Description Ok!
Category Ok!
Revision Ok!
Parameters Ok!
Detected pair of Parameters Ok!
The template format looks good.
*************************
Checking for older revision of Top C&A nets rev:1
Detected posible older revision in /etc/ossim/framework/panel/swf_plugin_templates/top_nets.inc
Local Name: Top C&A nets
The plugin Top C&A nets is already installed. Checking Revision Number
1 x 0
Upgrading Top C&A nets rev:0 to rev:1
Changing working directory to /
etc/ossim/framework/panel/swf_plugin_templates/top_nets.inc
usr/share/ossim/www/graphs/top_nets.php
top_nets.tgz Installed ok!