Custom 404 Redirect Page for Magento

Moved website from previous .cfm pages to php magento. Thousands of pages google indexed in coldfusion old site .cfm pages are right now being redirected to new magento home page. I have a mapping csv file of old cfm pages to corresponding new pages in magento. Would like the two columns to be added to mysql DB (magento DB) and then then 404 redirect goes to this page where the new page for the old missing page is sought from the table and then the customer is 301 redirected to the new magento page. Attached is the CSV file. the domain is [login to view URL] so [login to view URL] should go to [login to view URL] and this mapping is in the csv file attached. If it can be done without adding to mysql table, that is ok but I think it would be faster to have this mapping in DB, so I can add more files later, even if done from a file, I can edit file and add more mappings later. Need this done soon as google will drop these pages from its index