including jar files in jar files

I want to deploy a jar file. I have included two other jar files in it because they contain code that's needed by my class files. This doesn't seem to work unless I deploy those two jar files separately and stick them in the same directory as my jar file.
Is there a way for the jar file to look at itself for other jar files? I println the classpath when the main method is called and the classpath is the jar files itself - even though I point Class-Path at something else in the manifest.
Paul

You can create one jar that contains the contents from all the other jars. But nesting jars within other jars will not work.

Is there a way to do this using the 'jar' command rather than extracting all contents of the jar files first and then adding them to my jar?
Thanks.
Paul

I don't think so.
http://java.sun.com/j2se/1.4/docs/tooldocs/windows/jar.html