Although there is always risk associated with hiring someone to do Drupal work for you, you can limit your risk by following the advice provided here
http://drupal.org/node/51169.
Thank you for your interest. I apologize for any inconvenience this limited access causes. This online guide is now a book called Drupal: The Guide to Planning and Building Websites. The content of the guide is being updated, expanded, and edited. It will include tips for D6 and D7. I hope you will find it useful.
