I personally? -- Check out CPython Github repository and build w/e version I need. CPython's Makefile has altinstall command that installs as pythonX.Y rather

I personally? -- Check out CPython Github repository and build w/e version I need. CPython's Makefile has altinstall command that installs as pythonX.Y rather than just python. And if I need to have multiple Pythons of the same version, but, say, different in whether they have debug info or something like that, I modify the installation prefix. But, you can also download CPython source tarballs and skip the Git part. I haven't used CPython installers in a very long time... but, I'd imagine that the MSI would have a way to specify at least the location where Python is to be installed...