But I don't like to create a jar file with codebase classes and ser files. It seems that can cause some problems. A user library have the same problem, only jar files can be managed, can't add codebase dir. and no variables can be used to define classpath.
At the moment I use a .classpath file based on a path variable WT_HOME, but I'm not completely satisfied about it... I'm searching for a better solution.