Thanks for the links, everyone...
I still can't believe there's not some program for doing this. I don't think I'm the only one wanting to do this...
The VideoLAN looks promising, I've used it prior to this, but I only thought it played single movie files(.avi, .mpg, etc.) and not DVDs. But will try again, it's been awhile since I've used it, and some new features have probably been added.
The WinDVD things in the thread you linked to still requires you to backup the DVDs to the HDD. But RR's second link that he posted has a program called "EmpgPlay" and it says it can play "*.vob" files. (Those are the files that are the individual movie clip files on a DVD.) I don't know about the audio though...

I'm gonna try that out this afternoon.
Thanks again for the links, ideas, and helps!
Keep them coming, because I don't feel that I've found the solution yet. I'm still googling away though...
David
// EDIT
I just checked out the VideoLAN page, and on the diagram of the features it mentions streaming DVD playback... If that's true, then I'll be one BIG HAPPY CAMPER!!!
Will try it out and let you know...
// END OF EDIT