Glad to hear you got it working.
Just to clarify, in case someone else finds this thread, the "it's caused by a library missing from your jar file" bit is not an error on Minion's end. The jnlp files can specify a Main-Class to use, which javaws then takes and executes. From the jnlp:
<application-desc main-class="com.mmoui.minion.installer.Main">
|
.. which tells java which class to execute.