In answer to your actual question - can you encode something at 720x576 progressive 23.976fps, insert pulldown flags to make it 25fps on playback, and expect it to play on a DVD player - I've no idea.

However, I just wanted to add that the 1991(?) PAL VHS releases of Star Wars had something like this hard-coded into the video. Russ noticed the longer running time on the cover, and I had a look at a sample of his capture. Yes the pitch was correct - but the video was mess of interlaced frames and blended fields.