OK so I am NOT a flash designer/developer. I don't really want to be. The most recent version of flash I have on my computer is Flash 8 Professional, and as far as I know that was really the only version....
I'm waaaaaay out of date here. My boss has Flash Professional CS4. I'm want to make a few simple tweaks to the source code, but I really don't have a clue how to do this, or even get it built.
Can Flash Professional CS4 do the job? Or do I need Flex Builder? Flash Builder?
...
Can someone please explain to me what these products are, what they are intended for, and how this contrasts with the old school versions I'm used to?
Thanks!
Luke

You can use CS4 for compiling the V4 player.
However, if you are going to be compiling the V5 Player you will need Flex/Flash Builder. Or you can use Open Source Tools - http://developer.longtailvideo.com/trac/wiki/Player5Roadmap#AutomatedBuilding