If you don't have the RescuePack installed now, but decide to install it after this adventure (
) - -
Then you may wish to **ALSO** install the Coward's RescuePack Add-On.
That combination is intended for people who have a tendency to frequently brick their "main" mode.
(Although it doesn't help much for those who hijack a thread for a different topic.
JBpatch (this thread) is about modifying *.jar files **in memory** rather than on-disk.)