How do I install Python 2.7.3 32 bit and 64 bit on Windows side by side

Question

I have Windows Vista 64.

I have some projects requiring Python 2.7.3 64 bit and others requiring Python 2.7.3 32 bit (because some extensions do not work in 64 bit).

Answer 1

This appears to be working for me on Windows 7 64 bit. Choose one version to be your default installation, e.g. 64 bit, and install it first. Before doing anything else install the other version.

Specify a different installation directory and in the Customize Python 2.7.3 screen select Register Extensions and select Entire feature will be unavailable.