Without more information this is a pretty wide net / tall order to put out there. I'd start with linking Biblio::Citation::Parser to make sure that's you're talking about.

1) Yes. Did you look through the docs? It took me 10 seconds to find this :) from the how to-

 $Biblio::Citation::Parser::Templates::templates = [
        '_AUTHORS_, _PUBLICATION_, _YEAR_, _ISSUE_, _SPAGE_-_EPAGE_',
 ...
        ];
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2) Probably. This would likely be a bit difficult but if you provided samples of your input, you might get a bite here.