Sticking a wooden batten onto plasterboard to support a curtain railing? How should I prepare the plasterboard and what glue should I use?

How should I prepare the plasterboard and what glue should I use?

Where can i find??

Answers: I'd use something stronger than cement!

I'd use those cavity wall bolts, AND glue!

I am looking to dangle pictures on a...

intuitively id screw it to the plasterboard using proper plasterboard fixings,greatly stronger mate especially to hang curtains on.