On all platforms, you can relocate the complete eMake install directory (anything under the install dir , starting with the arch directory). A simple file copy is sufficient.
On Windows systems, you must ensure that the Visual Studio 2005 runtime libraries are installed. You can install the libraries by running …/i686_win32/bin/install_redist32.bat and/or install_redist64.bat on the new machine.
You can also choose to add the new location of the bin directory to the PATH.