Selenium and Flash

[snippsat]

Part of the site has an embedded flash widget

Is not Flash dead yet :D

Any thoughts on how I can manipulate text fields / check boxes inside a swf?

There is a flash-selenium module.
It's not updated in for some years,so do not know if it work.
I have used Selenium to a lot stuff,but not tested with Flash.
Some link and code.
flash-selenium
Some code that use Flash-selenium.

from com.thoughtworks.selenium.FlashSelenium import FlashSelenium
from com.thoughtworks.selenium.selenium import selenium

url = "http://flashselenium.t35.com/colors.html"
browserType = "*firefox"

selenium = selenium("localhost", 4444, browserType, url)
selenium.start()
selenium.open(url)

flashApp = FlashSelenium(selenium, "coloredSquare")
flashApp.percent_loaded()