I dont know how to grab audio from Flash, but try HiDownload. I've been using the same version for about 4 years now, so I dont knwo if they've made any updates in that area or not, but check it out and see.
edit: i just googled "rip audio from flash" and a few things popped up. may want to check those out as well.
“It’s a 16-ounce T-bone and a 24-ounce Porterhouse. Also, whiskey and a cigar. I am going to consume all of this at once because I am a free American.”
”Give a man a fish and you feed him for a day. Don’t teach the man to fish, and you feed yourself. He’s a grown man. Fishing’s not that hard.”