Hey Rusty, back to the original theme of your thread, the fades.
I don't know if you resolved this original issue, but here is my take on it...
If you're talking about a final fade on the end of the tune, I find it easiest for cleanliness sake to trim all the regions at the end of the tracks to where they end roughly in the same place, then place your fades on what needs them. Obviously, not every track is going to need to fade, but ones with droning or ringing endings need to go together (generally speaking) unless one or more items should stick out of the mix. I like to fade off ringing electric and acoustic guitars, bass and any room mics that add noise to the "drift off" of the ending.
I am not an engineer, just a self-taught musician who got sick and tired of the drummer not knowing what he was supposed to play, and got tired of spending multiple days trying to get a good track out of someone else, when I can spend one hour doing it track by track myself and getting what I heard in my head to begin with.
Anyway, what you heard already has been good advice. Make a seperate region at the end of each track you wish to fade and try to keep them close to the same grids for each. I use fades more often for cleaning up the end of the song then for actually fading instruments down while they are still playing, so my methods are likely to be a bit more simple. Having said that, I think the same rules may apply anyway, just longer fades for actual fade out endings and shorter fades for cleaning the noise and ringing notes off of the end of a track.
There are multiple parameters available in protools to alter fades (and even cross-fades) but I find the most direct tool to be "the hand". Once you have created a seperate "fade region", simply use "the hand" to hover the cursor over the upper right corner of the region and the hand will turn into a fade icon. Just click and voila, your region has a direct top left corner to bottom right corner fade. You can make it longer or shorter by simply extending the length of the region and doing the same thing.
For simple fades this is the most direct method. It's a lot faster then going into the edit, fades, etc. Do it all with the mouse and the cursor.
Hope I have been of some kind of help.
-Kev