(follow on article from http://www.nicklitten.com/blog/upgrade-drupal-6-7-part1-using-migrate-an...)
We are not focussed on a running an upgrde here, instead we are going to create a clean Drupal7 website and import (or migrate) the contect into it.
#2 - Setup a Drupal 7 installation for a Drupal6 upgrade
So, we have the original Drupal6 website now running in a clean state, with old crap purged and unnecessary modules uninstalled and deleted. You mileage may vary but my websites look something like this:
and the new install of Drupal 7 -- I set this up in a subdomain on the new server. It uses it's own database, is seperated into a drupal7.drumstheword.com subdomain and is just good old plain vanilla Drupal 7: