To make sure I understand, you're simply looking for a 'Browse...' subtitle menu choice?
Yes it is exactly what I described. It is the simpler solution to face the case I described.
The best concept I've seen to add missing subtitles on the fly to retailed DVD was the one of the free-ware DVD SUBBER, 10 years ago. It offered the ability to create a specific profile for each DVD (called "Media ID" in the program) where you specified synchronized subtitles and so each time you played the DVD, automatically the program loaded the profile. And the profiles was sharable as the subtitles were encapsulated (*.ZDS files). The issue was the video quality as it didn't offer any functionality to customize the graph. It last version was in 2003 ( the middle-ages now
) and no other software digs up more this great concept. So load external Subtitles during playback of retailed DVD or Blu-ray is the most common solution.
It will be great if you can add it, thanks!
I seen a lot of people complaining about missing Subtitles in their language regarding desirable Blu-ray or DVD edition in other country. It is one of the greatest advantage of the HTPC for me to have this ability to add on the fly Subtitles. Obviously, as you mentioned previously, I could rip them but I have between 75 and 100 Blu-ray concerned and the same for DVD so I don't want to lost 40 hours or more for an operation which have no real gain (I know that many people will be not agree on this statement).