[m0dem]

No sarcasm, just a general outline for him to start to approach this matter. Gotta think like a hacker not a skid

Help me understand this.

"Automation script, look up some scripts that are good for webpage information grabbing, process that through another script or possibly the same script and inject the info back into the site. "
1) Find a web scraping script A
2) "Process" script A through script B or script A (???)
3) Inject "the info" back into the site (???)

It was a haphazard reply and personally I've never done anything like this before but I would personally find a script to scrape a site, process the data returned, return to the website using possibly a different script if need be to plug in random data generated by the script. Is that not even remotely possible?

That makes a little more sense, but the OP needs to create "100" users on a site and he wants to automate the process so I think this needs a different approach.
1) Poke around with Firebug to get the necessary info. (login fields, xpaths, possible roadblocks, ...)
2) Make an appropriate Python script using gathered info and libraries such as Request or Selenium.
3) Run script.
4) ...
5) $$$


But if the OP doesn't know programming... he could hire someone.
OP, tell us more. (does the sign up have captcha's or anything?)