You either download Pharo Developer Image from the download section of the Pharo Website (it contains a set of developer tools, including a refactoring mechanism), or you use the following script in Pharo Core Image :
"Refactoring" Gofer new squeaksource: 'rb'; package: 'AST-Core'; package: 'Refactoring-Core'; package: 'Refactoring-Spelling'; load. "OmniBrowser" Gofer new renggli: 'omnibrowser'; package: 'OmniBrowser'; package: 'OB-Standard'; package: 'OB-Morphic'; package: 'OB-Shout'; package: 'OB-Refactory'; package: 'OB-Regex'; package: 'OB-SUnitIntegration'; load. "Tools" Gofer new renggli: 'unsorted'; package: 'Shout'; package: 'RoelTyper'; package: 'ECompletion'; package: 'ECompletionOmniBrowser'; load. "Select Tools" SystemBrowser default: (Smalltalk at:
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