Installation For Minecraft Server with Minecraft Forge, including MCPC-Plus and BukkitForge:
Download the latest recommended version which comes packaged as a JAR file. Copy the JAR file to the minecraft_server/mods directory. If an older Dynmap-*.jar or Dynmap-*.zip file is present in the mods/ directory, delete it (you do NOT need to delete older dynmap/ directories or their content). Start the server, and allow the plugin to initialize. Open browser, go to http://localhost:8123/ or http://ip-address-of-server:8123/. Check the minecraft_server/dynmap/ directory for the configuration files and one of the links below on how to further customize your settings.