[repost please help me] python setup.py build for 32-bits on x86_64 machine

[Sérgio Monteiro Basto]

Hi,
I am in x86_64 arch , but I need 
compile things on 32 bits with
python setup.py build

Can't change the fact that distutils creates x86_64 
directories:
build/temp.linux-x86_64-2.3/ 

Also if I try with a python compile in 32bits and installed 
in system .

how I force distutils build to 32-bits on x86_64 arch? 

Thanks in advance,