"Patch" for Drupal 5

I tried to get this module working in Drupal 5. I reviewed the Drupal 5 porting guide and the 4.7 version of this module doesn't seem to do any of the prohibited things. I just added a .info file and tried installing it in a 5.1 install and it seems to work fine. Hopefully I am right, but I am sure the author will have a better idea. But again, it seems to be working OK. For anyone who wants to try you can just download both the patch and the 4.7 version of the module, remove the ".patch" from the end of the patch file name, drop that "zipcode.info" file into the same directory as the zipcode module code, and install in your Drupal install as normal.