Hi Rocky,
Thanks and you're welcome. :) Well to be honest with ya man, I've never been in a situation (other than one time in all my years) where hats were not an entity, so to speak. In all the drum programs I've ever used as well as when I mic my own kits, there is ALWAYS an independent hat mic. I also like to mic my ride and would never just let it end up in the OH's.
But to answer your question, I would treat it like I would IF I was handed a track from someone that had all the hats and cymbals in one track.
For example, I had a client send me a track that had toms, hats and crashes/ride all in a two-track stereo file. This of course, was a nightmare but it was all he could do in his situation.
So what I did was, I cut the clip up in sections and then would slide it down into it's own track and label it. So if he was hitting the hats in a section, I'd split the clip on both ends and isolate the hats. Put it on it's own track and then use the Sonitus Gate (or PC gate or whatever else you want to use) to control the bleed of other instruments in that track IF I needed to. As you know, I'd need to eq the hat track here, so the instruments behind the hats might not sound too good. So I might have to gate them out or eq them out.
I'd do the rest of that track the same way until I cut up all the instruments in it and made them their own track. From there, if I wanted to Audio Snap them and turn them into midi files, at least it would be a bit easier to grab the transients, know what I mean? From there if some of the instrumentation did get through to where it was giving me ghosty notes via midi, we could literally use Audio Snap's threshold (which I didn't use in my vid and that's what Beeps and Zonno were talking about) which would allow or refuse the additional transients that might turn up. So that there is a good example on when you would use the threshold in AS.
So if you find you are in a position where your hats are in the OH track, split that baby up and isolate the hats before you do this trick. And of course if need be, you may have to mess with AS threshold to make sure only the notes you want are the notes you get. Hope this helps. :)
-Danny