Changes to custom shopping cart

I have a custom shopping cart and the variables such as the store address etc. are stored in a config file: $config['company'] = '**'; $config['company_slogan'] = '**'; $config['company_address'] = '**'; $config['company_location'] = '**'; $config['company_postcode'] = '**'; $config['company_phone'] = '**'; $config['company_extra'] = '**'; $config['company_url'] = '**'; This is only editable my manually updating the config file. These are then printed on the invoice by code such as: {company} {company_address} {company_location} {company_postcode} I need to change this so they are stored in the database and can be updated from the admin area by the user.