Try here:I know its a bit OT, but do you guys have a reasonable DDM spreadsheet you are prepared to share? I have downloaded a couple but they are not the best to work with! I have tried making my own but i think my excel skills are not up to it!
http://people.stern.nyu.edu/adamodar/New_Home_Page/valuation/val.htm
There is a section called "Spreadsheets." It might require you to also read some of his guides and course papers.