@decay. the short answer to your question is YES! You can use it anywhere on the site. It’s a plugin. That’s how they were designed.
As for the syntax, you have it right except for the parameter name and the lack of single quotes. Please look at the paramater list on my website. But, basically, you would have something like:
{easyfolderlistingpro folder=’images/pressreleases’}
and on another page (or even the same page) have:
{easyfolderlistingpro folder=’images/news’}