Is it possible to add Planned hours (or any field available in for a task) to be added to the import list?

We have multiple projects with relatively short run times and loads of tasks and sub tasks. It costs a lot of time to add Planned Hours for each task manually.

Also is it possible to have the field list to be automatically populated? each time we do a task import we have to select the fields, but since we automate our task list file generation, these columns will always be called the same and be in the same place. Having to select them each time, again is taking a lot of precious time.

Thank you.