Problem with Tomcat + WAR + ClassPath (help please)?

I’ve got a very simple problem… I’m trying to get a WAR file running under tomcat that references an external JAR file.

I thought it would be as simple as having a manifest file with a class-path. That doesn’t work, clearly I either need to set a web.xml context-param or enable tomcat to look at the manifest for the class path.

Help???