Different commands on same key?

[Grasshopper]

Hi,

I love Sage and have my system working fine, but I can't resist the urge to tinker. (I'm guessing a lot of us are like that, or else we'd have gotten a Tivo and been done).

What I'd like to do is have the same keystroke do different things, depending on what Sage is doing at the time. For instance, take the two fast-forward buttons. I know how to change the time that's skipped. But here's what I really want to be able to do: Program the FF2 button so that it skips 150 seconds (or whatever) when watching a TV show, but sends the "DVD Next Chapter" command when I'm watching a DVD. Is this possible? There are, of course, other buttons I'd like to be able to program for double duty like this.

I'm using a Firefly, if it matters.