This is a page from the Flash Renamer user manual.

Set Attributes

The Set Attributes function allows you to change the attributes of files and folders. To keep the current attributes, set the checkboxes to gray (shows in XP as a 'full' box) for the attribute you don't want to change.

    You just copied files from a CD to your harddrive. Since the CD is read only, all files have the write protected attribute set, making it impossible to work with the files.
    Using the "Set Attributes" function, simply uncheck the write protected checkbox. Leave all other checkboxes gray so you don't change them.