That's what I did, it's a pretty simple computation.
I now know what time I have to make (assuming all hits, all alphas, all points) for each classifier stage for A, B, etc. based on inverting HHF and using a percentage (75% for A, 60% for B, etc.). I made a three ring binder with all the stage diagrams and information printed out. I put a hard copy of this spreadsheet at the front of the binder, so now when I arrive at a match, I can quickly look up the Classifier that's going to be shot on the spot.
Before, I would turn up at a match, look at the classifier diagram scrawled on a the paper, and basically hope for the best by shooting it as fast as I could, without any regard for what I'm trying to achieve. By having my binder, I feel I am now a lot better prepared to plan my match.
To use in Dry Practice, I've also gone so far as to "group" all the classifiers by common themes; reloads, shooting static groups, etc. Then I've been working on those themes daily, using the 14 Core Classifier skills listed in Book 1 of Steve Anderson's books (well, the CC skills plus the Match Core Drills and Plate Rack Drills, but not as often as the CC Drills.) It's interesting (and good, obviously) that Steve's CC Drill skills pair up well with the many of the common themes found in the 85 Classifier Stages in USPSA.