Hello Jetta,
For a novice coder like myself, can you tell me which USPS rate v4 module I should install for an osCommerce version 2.2-MS2?
I installed and followed the instructions for "USPS Rate V4 Intl Rate V2", but my edited perferences in the Shipping Module admin page wouldn't stay (after clicking "confirm"), and this link (http://www.uspsprioritymail.com/et_regcert.html) was not good when I went to check on my USPS account status.
Thank you so much!
Matthew