Since the installer of RTW gives the possiblity to change the installation path, setting it to something like 'd:\games' (which is my install location) does work. You only have to bear in mind, that you have to point the EB installer to the correct path, where you have installed RTW to. If you already have an installation, Windows may prevent you from a second installation because it thinks you already have installed it, which results in not giving the option to install it.