Is it possible to target 64-Bit OS in the InstallScript Project or do I need to use the InstallScript msi Project? There is no Template Summary Property in the InstallScript Project. Or am I wrong?
For a pure 64 bit setup you would need to use InstallScript MSI project. Pure InstallScript project are 32 bit setup's which will still run/install on a 64 bit OS as 32 bit process.
Pure InstallScript projects can install on either 32-bit or 64-bit platforms. The only work that is typically needed is disabling/enabling file system redirection through script if you have any components that need to install to 64-bit paths (specifically, installing to the System32 folder on a 64-bit machine), or disabling/enabling registry redirection if registry data needs to be created in HKEY_LOCAL_MACHINE\Software. In addition, InstallScript will provide more flexibility than an MSI project if you would like to have a single installer that can install on 32-bit or 64-bit (MSI generally requires two separate packages if you need to include 64-bit components and install on 32-bit and 64-bit machines).
Typically, we would either recommend using a Basic MSI project if you would like to install with a Windows Installer package, or a pure InstallScript project if you need more flexibility that what MSI offers and you are not tied to using an MSI installation. InstallScript MSI projects are generally not recommended due to additional complexity they introduce.
