Need Help with Zen Cart

There are a few issues I need resolved within Zen Cart 1.3.8a - 1 - Since there was a live site running on my customer's domain at the time, we configured a subdomain for testing and setup purposes. Now when entering the domain into the browser for the admin ([login to view URL]) it redirects to ([login to view URL]). On the public side of the site, the homepage loads using [login to view URL] but all the links point to http://domain.skiltech.com. This might be somewhere in a config file, but if so I can't find it. 2 - The [login to view URL] comes up as Not Found under [login to view URL] even though the file itself is in /usr/www/[login to view URL] *and* /usr/www/[login to view URL] on the server. I would expect it to be called from at least one of those locations. But maybe not. :) 3 - When attempting to upload new product images, we get these error messages: "Error: Catalog images directory is not writeable: /usr/www/[login to view URL]" and "Error: Destination not writeable /usr/www/[login to view URL]" In fact,that directory is set to full RWX (777). Someone with a firm grasp of Zen Cart will be able to identify and correct these issues quickly and easily, so I expect the bid prices to be reasonable. Please note - ALL COMMUNICATION regarding this project needs to be handled through this website. I will not accept phone calls, Skype requests or emails until after the project has been awarded.