I have updated the Sheet Creator Addin for Revit 2011 SheetCreator_2011-2.zip in the download section. It now includes parameters for Sheet Discipline # and Sheet Grouping # as well as the ability to make placeholder sheets. You can use the pre-populated list on Sheet Discipline # or you can enter your own text in the box. To utilize these parameters, you should download the SheetCreatorSharedParameters.txt file. I am always open to new ideas for development so leave a comment or send me an email. If you have not used this tool yet, the video below will show you how easy it can be to create sheets.