Port Java language support to Beanshell

Hi, I work with Beanshell quite often.  Although I've managed to get basic syntax highlighting working by associating Beanshell files with Java, there are still a lot of things that I would like to get to work better, like auto-complete, doc lookups, etc.  Another issue is that all Beanshell code in the editor is underlined in red and the help-popup says "Class or interface expected". I'm not a Java programmer but I think this is caused by Beanshell not needing explicit declaration of classes or libraries as they're included automatically at script runtime.  

Either way, my intention was to take the build-inJava language support and port it to handle Beanshell by removing some of the sytax checking or whatever else.  Honestly, I would be happy with just getting rid of the persistent red underlining regarding the class declarations by forcing the editor to ignore that check.  I thought this would be faster than starting from scratch.  Is this something that's doable without more effort than it's worth?  

Any input appreciated.  

Thanks.