Do not directly edit any of the files that make up the sample portal (display profile XML, JSP, and template files). Instead, make a copy of the sample portal files to modify to a new directory and then modify those copied files. In this way you preserve the integrity of the sample portal. Additionally, if you later apply a patch to the Portal Server, you won’t loose any changes you might have made to the sample portal files, as the patch would only overwrite the initially installed sample files.