To use this plugin after installing the gem: require 'scaffolding_extensions' If you want to use it without installing the gem, add this before requiring it: $:.unshift('scaffolding_extensions/lib') If your models are not located in model/, it is easiest to let Scaffolding Extensions know about them manually (this is only necessary if you are using scaffold_all_models without :only): ScaffoldingExtensions.all_models = [Model1, Model2, Model3] You should add this code after your models have been loaded but before your controllers have been loaded. Also, note that Scaffolding Extensions uses the :Erubis engine in Ramaze, so you must have Erubis installed to use it. Finally, note that should not call map after calling a scaffolding method in your controller.