[Pharo-project] How do I install seaside in Pharo 1.0?

Hello, I have problem installing Seaside on Pharo 1.0. Evaluate ConfigurationOfSeaside >> workspace did not work. I have also tryed this code: Gofer new squeaksource: 'MetacelloRepository'; package: 'ConfigurationOfSeaside'; load. ((Smalltalk at: #ConfigurationOfSeaside ) project latestVersion) load it did not work to. Why does the code DEVImageWorkspaces openExternalProjectWorkspace did not show an easy way to install Seaside (it was the case before)? Cordialy