I attempted to do a methodical analysis of the Black Screen Bug.
What I did, exactly:
I saved my game just prior to having T3-M4 use the console. I then used the console, unlocked the door on the Admin level, and logged out. That's it -- no other commands.
Results:
The game would sometimes stay black screened, but sometimes (immediately after T3-M4 gets shot and the game fades to black) I got the Saving/Loading screens for the next scene. The results were immediate. Either the game progressed within a second of fading to black, or it stayed black for good.
I did this more than 20 times, and the game progressed normally only about a third of the time.
I then tried a few other variations, based on suggestions in this forum:
1. Renaming my directories, changing ini file content, etc. had NO statistically significant effect on the outcome.
2. Character type (Guardian/Sentinel/Consular) has no effect either.
3. Exiting and watching the intro video prior to using the console does not reliably advance the game, either. Perhaps others have had 100% success, I have not. Further testing is required. (Any volunteers?)
I think this bug is more of an annoyance than a show-stopper, but I'd be interested in seeing some data from other people with Kotor II on their HDs.
As for those that think they've found consistent workarounds -- try a few more times and report some success rates, please. The first time I tried the Intro-video-watching method, it worked and I thought I had found The Solution To All Our Problems. Until I tried it a few more times and realized that it was no more consistent than just loading and retrying.
Note: At no point did I have to clear my x/y/z drives.