- that depends what you want to achieve. If you planned the Template to use on bike, make it smaller so it fits and both grounds align
- as far as I know, not. And I doubt it could be done via javascript (from what i remember javascript should not be able to manipulate local files by design)
- yes, or you can take a tracing paper, put it on your screen and trace it with your pen. Whatever you prefer.
... there have to be usage instructions somewhere on that page...