Hi,
If you are using Pharo 3 you may install a Nautilus plugin I did which implements the following menu item features:

- Jump to the superclass of the currently selected class.
- Explore all the instances of the currently selected class.
- Send #release and #initialize to the currently selected class
- Send (#perform:) the selected unary method to a new instance of the currently selected class.

To install evaluate:

Gofer it
������ smalltalkhubUser: 'hernan' project: 'HernanPlugins';
������ package: 'HernanPlugins';
������ load.

Repository: http://www.smalltalkhub.com/#!/~hernan/HernanPlugins

Cheers,

Hern��n