Thank you for a really great reply there!

The plan was to play with my computer monitor, and just let the VCR record everything I do on my screen.
I also want the sound on the tape, but still be able to hear what is happening through my headset. How do I do that? Can I somehow split the signal?

Does anybody know how the quality on the tape will be? Does it get as good at seen on the screen?
I will import much of the material from the tapes into my computer, is there any loss in quality, and if there is, which programs should I use to tune the signal etc?

Big thanks to Marc Peters, and everybody who intend to write an reply!