[CMake] CPACK_NSIS_MODIFY_PATH issues

[Schneider, Christian10]

Hi,
I am using CMake 2.6.4 with NSIS 2.4.5. and run into a problem when setting CPACK_NSIS_MODIFY_PATH to ON (which forces the installer to show the dialog to let the user decide whether or not to add the application directory to the system PATH). This works fine, but I would like to know which variable CPACK_NSIS_MODIFY_PATH uses to set the directory. It obviously uses the path the user enters in the installer, but it appends a /bin to this path (and I would like it to append /bin/anotherdir instead, since the executables are installed there).
I just couldn't figure out where this /bin is set and hope someone can bring some light into the dark.