Magento Admin Problem/ Online Customer Location Filter

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
Recently, I hired a developer to install a Magento extension for Facebook "Log-In" Connect. After installing the extension, the admin side is no longer accessible. This is what is says. "There has been an error processing your request" I am not able to access the admin side because I still have items to edit, but I cannot do so. I need to get the admin side fixed. I'm not sure what the problem is exactly, but if you are familiar with Magento and can fix this problem, please bid.

People have already been purchasing on the website, however due to no Admin Side, I have not been able to fulfill these orders, so this problem must be fixed as soon as possible.

Also, the other thing that I need is a customer location filter. Customers from all over the U.S. have been purchasing product off my website. However, I sell liquor on this website, which means that there are many rules and regulations. The most important being that I cannot sell out of state. Our business is located in CA and can only ship to CA. So I will need some type of filter at the beginning asking potential customers what their zip code is so that non-California residents will not be able to purchase from my website.

Please view the attached Photos to clarify what I am asking of this project.

Please only serious bidders who can do the job 100%. Thank you very much for your time.

Skills required:
eCommerce, Magento, Shopping Carts, System Admin, Website Design
Additional Files: Magento+Error.png Customer+Filter.png
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