So sorry for your recent troubles. Fortunately, we’ve seem them all, and in this situation, the best steps you can take is to take a full backup of your files and database.
Next, load up a second, fresh store of version 1.4.1.0 with the same database prefix into a subfolder, for example, domain.com/clean
Download and insert the Magento database repair tool located here:
http://www.magentocommerce.com/download
Into your document root.
Run the repair tool and fill out a brief bit of information, and it should automatically clean things up and fix any problems.