[NTG-context] Minimal ConTeXt in 64 bits machine

Hi, Is it possible to install the minimal context distribution in a 64 bits machine? I downloaded 'justtext' and 'linuxtex' zip files, and I see that the environment setup script sets TEXFOS variable to a 64 bits specific directory when it detects a 64 bits machine. However, that directory does not exist in those zip files. Can I get it somewhere else? I'm using Ubuntu 7.04. Thanks, Maurício