Due to the fact that sfLoader is only a "static method holder" it is not possible to override these methods. Makes sense for example to change the template locations. For example this leads to the ugly situation that the sfDimensionsPlugin needs to provide an alternative sfLoader version that needs to replace the original file to work.
Maybe a better solution would be to turn sfLoader into a context object?
But I see the problem that it would also be nice if we could override each method separately by another plugin. So maybe the "master solution" is to have a static var $dispatcher and to add a hook into each method so it can be overridden by a listener.
