Cool feature that should be implanted in all other emulators me thinks. :)
I feel that this is somewhat what some of us has been asking for earlier too. The possibility to rewind or fast forward to a desired frame.
If you take a look in the Gens forum where the thread "Tools for easier hexediting" page 3
http://tasvideos.org/forum/viewtopic.php?t=2607&start=40
My friend implanted a breakpoint so when you frame skip at fastest speed you can tip in a frame number you wanna stop on, and then it plays along with frame skip until reached. Then a popup box appears and pauses the movie so that you can set speed to normal. However his code wasn't that good and he didn't give me the source for it.. Yet. But this might be an interesting feature as well to add right? Like if you're watching a fullblown FF6 run and you have to run out and forget to make a savestate which you can load when you get back. Then you would have to watch the entire frameskip procedure which can be very annoying. Frameskip + break is good enough right now I feel.
Sorry about somewhat loosing the topic there. But I think this feature would be good for rewind as well as fast forward. And I suppose it coulden't be that hard to implant if you're a good programmer right (which I'm not)?