Vista web filtering file formatting

The project entails creating a .weballowblocklsit file that can be imported into windows vista parental controls easily. No blocked URL's are in the file, only allowed url's only are in the file. The final project should be a file that can be imported into vista without errors, containing all the allowed sites. ## Deliverables the final Project should be a file that I can import into windows vista parental controls without an error, keeping the original list of URL's, but making any formatting changes to allow it to work without errors.?