Chris,
A little late in the day to answer to your plea I expect unless the imminent need for advice has receeded.
If not too late I would go to the library for I found any number of books on the subject of interview techniques there.
Matter, I suggest, of reading the advice and twisting it to fit in with your particular circumstances.
I was lucky possibly for I was successful in my interview and that was simply for promotion in my work and not a job interview.
Hope you succeeded without this advice if the needs must