Copycat allows players to render images from a URL into the Minecraft world. Just install the plugin by copying the downloaded .jar to your bukkit plugins folder. In game, type /help copycat to get started. Commands are shown below
/cc: Image rendering commands
/ccadmin: Admin operations. Mostly griefing management
/ccimg: Commands for various image operations
/ccset: Sets plugin properties
/ccstamp: Rubber stamp mode commands
If you are having trouble getting the plugin to work, you need to post some descriptive information, such a stack trace, what you were doing, command used, etc. Otherwise, I will be unable to provide you with any kind of support.
Use the download link in the top right of this page