Force Python interpreter used by PyCharm to run in 32-bit mode

I have a problem where I need to run the OSX Lion python distribution in 32-bit mode.  I can do that for when python is run in the command line by setting this system variable or default:

$export VERSIONER_PYTHON_PREFER_32_BIT=Yes

$defaults write com.apple.versioner.python Prefer-32-Bit -bool yes (set that permanently)

But I can't seem to get PyCharm to run the interpreter in 32-bit mode.

How can I do this?

Thanks in advance for your response.