Custom Installer

I need an installer for my custom software. The installer will run as a standalone executable because I package up different files for each installation of my software. The installer must work on all recent versions of Windows. e.g - XP, Vista, Server 2003, and Server 2008. ## Deliverables I need a Windows installer for my custom software that does the following: 1. Makes sure that a given .Net Framework version is installed (3.5 SP1) 2. Displays a license agreement that the user must agree to in order to continue 3. Displays buttons that will open web pages 4. scans the program files directory for an executable name and suggests an installation directory 5. Looks in the current directory for files with specific file extensions and will place those files in specific folders 6. Installs a client certificate (pfx file) on its own or running an existing application. It will need to verify that the certificate is installed in IE. 7. It will need to work reliably on x86 and 64 bit machines (Windows XP SP2, Vista, Server 2003, and Server 2008).