Also, these other approaches to deploying in shared hosting can help:
- Zend Framework on shared hosting
- http://www.alberton.info/zend_framework_mod_rewrite_shared_hosting.html
- http://akrabat.com/zend-framework/zend-framework-on-a-shared-host/
- http://www.ttech.it/en/article/2010/03/zend-framework-all-projects-files-on-document-root/
In particular, an answer by tharkun led me to write it up in more detail in a blog post.