FYI, I was successful in faking the keyboard input by using a series of invisible buttons around the edge of my movie that onRollover had the same action has the pressing the keys.
Although it took a few attempts to get used to, it did the trick allowing me to export real-time Flash game footage.
I used SWF2Video Pro, and it saved me a LOT of time. It's not a perfect solution but I'd recommend it to anyone that's got quite a few bits of Flash to output to video.
The results of my SWF2Video exploits can be seen on the next Creative Review magazine DVD (only sent to subscribers), where you can view my Life of Pi promo in full.