Help Required -Importing Themes

I’m just getting to grips with Drupal and getting some positive results.

I’m working on a Bitnami Drupal installation via VM Player on Windows XP. Used all the defaults and just hosting locally whislt I learn the package.

I can’t find the folder Sites/ALL.. so that I can add Themes downloaded from Drupal.org and other sources.

This this is my first experience with VM. I’m beginning to wonder if it would have been easier to use the WAMMP route rather than the stack…. can anyone help me located the correct directory structure please.