Saving a CSV File to A Specific Folder in UJFS from BPC

Hello,

We have a process that generates a CSV file within Excel that utilizes BPC functions to create a mapping file.

This mapping file needs to be saved to UJFS as a CSV file (so it can be pushed to AL11 and used in a BW mapping process).

Issue 1) Using the API, I can SaveToServerRootFolder, however, even if I change the file extension to .CSV, it will save it to the root folder as "filename.csv.xlsx"

Issue 2) Is it possible to automatically save it to a specified folder without the user seeing anything?

What I mean here is, a user will open this file, select their entity (which will be used to populate the filename automatically), the process then creates the CSV file, and saves it to a specified folder which is set in the VBA code? 

As in, how can I pass parameters through to SaveToServerRootFolder that provide the filename and folder location for the save, and automatically save it?

If this is not possible, what other options do I have for saving a CSV file to the server in a specific folder?

Thanks,

Alex