URGENT Open Source Java Applet Signing

We need to signed an open source applet we use on a web site to avoid the "This applet was signed by “xxxxxxxx,?? but Java cannot verify the authenticity of the signature’s certificate. Do you trust this certificate?" it shows upon loading currently. We are using this applet for which the source is available: [login to view URL] We need a JAVA expert who can quickly build a version that would be properly signed so that such alert is not shown to users. You can currently test the version we have (pretty much the version for the Poslet web site) here: [login to view URL] Some information about the signing of the applet from the application forum: I found some info on the postlet forum for the signing: [login to view URL] [login to view URL] [login to view URL]