It is not possible in current version. Maybe in future, but I do not plan this currently.
I was wondering if WinSCP had the ability to remotely edit more than one script at a time, and if not - would it be possible to implement? I love the editor, but often i want to jump back and forth between scripts in seperate directories and it would be a lot more efficient to simply have a tabbed editor, with the different scripts open at the same time... Thanks for a great program.