I have only tried out Beaker browser with tiddlywiki for a couple of days now. Normally I am using Firefox. That lead to me dragging the plugin from a tab in firefox to the Beaker tab with my new tiddlywiki. It seem to work okay. I think it should be possible to export the plugin from the tiddlywiki and then import into your wiki.
I have been wondering how many in this group is using Beaker with tiddlywiki now, it sure is interesting.
Birthe