Identity Manager 4.0.1 allows coexistence of 32-bit and 64-bit Remote Loader on a 64-bit operating system. If you are upgrading a 32-bit Remote Loader installed on a 64-bit operating system, it upgrades 32-bit Remote Loader and also installs 64-bit Remote Loader. You can have both 32-bit Remote Loader and 64-bit Remote Loader on the same machine. The installation program detects the type of OS that is installed and then installs the corresponding version of the Remote Loader. For the installation instructions, see Identity Manager 4.0.1 Framework Installation Guide.