Using our Electronic Registration System (ERO) 1) Go to Denison ISD website: t 2) In the pull-down menu at the top of the page, click on: Staff Resources 3) Click on: ERO - Electronic Register Online 4) Click on: Browse the Public Catalog (It is located directly above the Login) 5) Accept the. Not having that entry would cause Drupal not to work correctly in some circumstances. 9) Click Select on right of session. . Click Save and Close on the top left corner. . Network Log-in ID (.g., jdoe ) and pin number. The PIN field must be a minimum of 4 digits and no more than 9 digits. Follow the directions below: Log into Myaacps-PD (ERO). (under where your user ID and PIN are entered).