I also don't own a 47V, but as far as the VHS, on my ES-30(2yr old Panny w/VHS, it has quite good PQ with the VHS. What speed did you use? On my es-30 it has a 10 hr speed called VP. As can be imagined it is not very good PQ.
On your 3 different files. Since I never watch my DVD's on a PC, I'm not sure whats happening there. I would think you would only have separate files when you push stop. When you do push stop, a separate title is generated.
As far as chapters, I don't believe there is anything you can do about that. Panasonics generate chapters every 5 minutes or so. I don't believe you can stop it from doing this. Some DVDR's will allow this, I know on the Philips 3575 you can change the timing of the chapters, or remove them all together, but my Panny's anyway, you cannot change this. The one exception is RAM discs. With RAM's you can add/remove chapters. Maybe they would work better for you. I'm believe all PC's play RAM's??
Digido brought up a good point. From what source did you do your 2hr -RW recording from. Was it from VHS, DV input, line input or Tuner?