I am in a lab environment

I have imported about 80 users, set to sage authentication method, password never expires, change password next login

I need to run various tests that will require me to login as a bunch of the 80 users

once i am done testing I will be setting all users back to authentication  method of windows and authenticating to the domain

This plan seemed good but because my testing is with a 3rd party web package that interacts with the sage data, my idea of change password on next login and allowing me to set it to a generic password doesn't work as the web package doesn't get the prompt to change.  So that would mean after importing I would have to login as each of the 80 to set a generic password for testing.

I want to import a password.  The password is stored in binary it looks like from the API.  So I tried using a txt to binery converter and converting abc to 01100001 01100010 01100011 and importing but that didn't seem to work.  

Does anyone know of a way to import a generic password  - it can actually be anything  - as it will only be used for a brief testing period.