I am installing a DEMO of 154 to make sure all the customizations in 139 are captured. Created SQL database on host for the demo, unpacked 154 to a 'demo' store folder on host. Have renamed configure files/changed permissions per below instructions in docs/readme_intallation html file.

For a new install, the simplest way to do this is to rename these two files:
- /includes/dist-configure.php
to /includes/configure.php
- /admin/includes/dist-configure.php
to /admin/includes/configure.php

After renaming and changing folder permissions to 777, I put specific domain/demo folder info browser url per: http://www.mydomain.com/catalog install instructions.

Then I get the system setup required screen, and when I click here to continue, I get 403 forbidden permissions error. What am I missing? Have existing store on host already working, so the server/host side should be ok.