Visual Studio Setup and Deployment - Changing installation for Single User and All Users

I have a Visual C++ Setup which I created using Visual Studio Setup Wizard. I'm trying to give the user option of selecting to install for himself only or everyone. How do I do t开发者_开发知识库his?? Even though I can select a radio button saying Install for All Users at install time, it did not work. I need this to work in Windows 7. I have some files(Some Add-in files for MS Excel, .XLAM) to be copied and a DLL which is automatically registered so those should happen for everyone as well. IS there a specific folder in the machine that I should copy the .XLAM files for them to be available for all users??

Thank You!