Scripting is not part of the Jcurve product. Options a) for a specific purpose you can request that it be enabled while you do your project b) you can develop/edit your scripts in another account and install them already deployed. (Difficult). C) if the script already exists you can probably edit the script file directly (but not play with deployment). D) upgrade account to a NetSuite licence.
I did play with cut:pasting the URLs from a NetSuite account to Jcurve account number and can’t recall if that worked.