changing the manifest file of a jar

hi, i created jar file using eclipse.
the problem is that it doesn't recognize a jar file that the class use.
i need this jar to recognize and use the other jar.
i got an advice of changing the manifest. well, i opened the manifest with notepad
and i don't know how i have to write in it the reference to the other jar.
thanks for any help !

Moshi,
Please do not start multiple threads for essentially the same question.
Let us continue the discussion, in the original thread here http://www.coderanch.com/t/471297/Java-General/java/jar-doesn-t-recognize-another
Closing this topic.