Thanks a lot for the code!

A few links on the topic:

Refactoring Browser
[now includes Daniel's mail]
http://minnow.cc.gatech.edu/squeak/227

Porting the Refactoring Browser
[Camp Smalltalk page]
http://wiki.cs.uiuc.edu/CampSmalltalk/Porting+the+Refactoring+Browser

The Camp Smalltalk Refactoring Browser Squeak Port project
[Bob Hartwig's page, not yet updated]
http://www.bobjectsinc.com/squeakrbalpha/

Refactoring Browser
[John Brant's & Don Roberts' Refactoring Browser page]
http://st-www.cs.uiuc.edu/~brant/RefactoringBrowser/

Andreas