[Seaside] How to reverse unregister handler?

[Marco A. Gonzalez]

To prepare my image for deployment, I created a "Developer-Only" page on which I have an anchor whose callback executes the following:

unregisterAllHandlers
	(self confirm: 'Are you sure you want to unregister all handlers. This should only be done on an image that will be deployed. This action is irreversible for this image.')
		ifTrue: [
			WADispatcher default unregister: (WADispatcher default handlerAt: 'examples').
			WADispatcher default unregister: (WADispatcher default handlerAt: 'comet').
			WADispatcher default unregister: (WADispatcher default handlerAt: 'tests').
			WADispatcher default unregister: (WADispatcher default handlerAt: 'tools').
			WADispatcher default unregister: (WADispatcher default handlerAt: 'welcome').
			WADispatcher default unregister: (WADispatcher default handlerAt: 'config').
			WADispatcher default unregister: (WADispatcher default handlerAt: 'status').
			WADispatcher default unregister: (WADispatcher default handlerAt: 'javascript').
			WADispatcher default unregister: (WADispatcher default handlerAt: 'files').
			WADispatcher default unregister: (WADispatcher default handlerAt: 'browse').	
		].

Is there a way to get those handlers back? If so, how is it done?
Is the above a reasonable way to "protect the image" in deployment?

- Marco A.