Woohooo! It’s OK folks I have solved it myself. Isn’t it funny how articulating a problem so others can understand it can remove your own blinkers? I was so fixated with thinking it was my inability to use the software that I wasn’t thinking outside the box. Until I had to spell it out, then it became obvious.
The problem? Cheap RW DVDs. Switched to high quality DVD+R and it’s worked a dream. 🙂