hex edit the file and proxy it or alter the process in memory. These weirdly named scripts are renamed every week there is an update. I hope now you appreciate more the existing hacks lol.

oSeriously, you look for patterns or take your time to map is with trial and error until you are satisfied by the results. Some of the early birds cheated by using an old leaked debug swf that had less protections or something. I don't have it though and I don't even know if there's somebody who still has it