how can add resource data (CommonUIString.---) to a class

Question

hello.

would someone in here be so kind to explain to me how I can add resources to a selected class when I have that/those specific resource(s) in the project already?? An example would have been that of CodePlex.SharePointInstaller, where we have for many of the conrol classes thier respective resources (sometimes double?). many thanks in advance debru