Schedule report programmatically with different parameter values

[pspjasper]

Hi,

I am using Jaspersoft Studio 6.4.0 and Jaspersoft Server (not pro) 6.3.0 .

I have developed a webapp that call a report passing a parameter via rest v2 web service and open the PDF in the browser when the user requests.

Now in order to fullfill a new request my need is to generate programmatically a list of values for the parameter, for each generate a report and store the PDF in a path (FTP or FileSystem).

I found here something about modify a schedule by editing the XML but I don't understand how to.

I am looking for a solution in the community and reading the documentation but, if possible, I need to be pointed in the right direction.

Thanks in advance for any help or suggestion.