Running a repository build by typing a path such as
  F:\Python\dev\36\PCbuild\win32\python_d.exe
is tedious and error prone and I have to remember to omit '\win32' for 2.7 and it takes up much of a command line.

I would like to be able to run something like
  py -register 3.6r <path above>  # 'r' for repository, or possibly '+'
and subsequently have
  py -3.6r
launch the locally compiled but un-installed binary.  Possible?

I did not find 'py launcher' in Expert's Index or Components, so selected you two from memory and 'Windows'.  Please modify Components and Nosy as appropriate.  I have an impression that there is a launcher version for Mac but know nothing about it.