All "plugins" go into the "plugins" folder where you have your CraftBukkit JAR file Turn off the server (if it is running) Simply choose an economy plugin (such as iConomy) Move the JAR file to "plugins" Edit the settings (optional) Download Register or Vault and move the JAR file to "plugins" (no settings required) Download Gold2Economy and once again put the JAR in "plugins" Edit G2E's settings (optional) Start the server Try the commands, if you get "internal server error", check your server.log file where your CB JAR is, look for a "stack trace" (looks something like this), if it mentions "Gold2Economy" anywhere, post it here so I can help you further. If you choose to edit the settings of a plugin (such as Gold2Economy), you will likely find it in the plugins folder, from there look for the name of the plugin (eg: Gold2Economy-Vault) and open the folder; Inside you should find a config.yml file. To edit a setting simple change the value, YAML works where anything before ':' is the variable name (developer side) and anything after is the setting, don't edit the number of spaces before the ':' and ensure you have not used the TAB key. As well, do not edit the 'variable name', this will break the plugin. Let me know if you need any more help Edit: If the folder is not there for settings, simply start the server then turn it back off. The folder will be generated. To turn off the server, type 'stop' into the console window. Don't use the close button on the window. For all the people saying that you don't need to start and stop a server this frequently, you are right. But it is safer to stop the server then edit settings than it is to leave the server running.