Creating Installable exe file and product key generation - uninstallation problem*

Question

Hi,
I have created a project which contains 40-45 windows forms (using Visual studio C# express edition 2008). Now I want to create an installable exe file for my project. As in 2003/2005 .NET framework there is no option to create an installable exe file in 2008 edition.  So plz help me to create an installable exe file for my project. Also I want to know how to generate a 16/25 digit key code to my project, just like windows, I mean when we install a windows os to our system it asks us to enter a product key similar to that I want to have a product key for my project.
 
Thanks
Sachi