Use of FM: 'SXPG_COMMAND_EXECUTE'?

Hi Experts,

1. Through FM --> 'SXPG_COMMAND_EXECUTE' can we READ/PUT files in external Server(other then SAP) - From FM documentation I read target system should be SAP App.server.

2. If the answer of the q1 is yes, then how do we pass the password of the target system from FM --> 'SXPG_COMMAND_EXECUTE'  from source system?

Your help is greatly appreciated.

Thanks,

Madhu M V