yes, check the archives. I opened tickes for that. and I sent several mails. Seems no-one has time to do it.

http://code.google.com/p/pharo/issues/detail?id=1915

On Fri, Jan 28, 2011 at 10:44 AM, St�phane Ducasse <stephane.ducasse@inria.fr> wrote:
Because it would be good that it uses a registration mechanism.
Hardcoding the classes of the tools is not optimal for example for the new Finder.

Stef