1. Copy default.setting.php in the same folder and rename to settings.php
2. Set permissions of default folder recursively to 777
3. Modify .htaccess by adding this line to the bottom:
php_value max_execution_time 60
4. create folders for non-core modules in sites:
sites/all/modules
sites/all/modules/contrib
sites/all/modules/custom
sites/all/themes
sites/all/themes/contrib
sites/all/themes/custom
5. unzip WYSIWYG module to sites/all/modules/contrib
6. follow instructions to add CKE editor
Here's a video tutorial using FCKEditor