SAP EDI INVOICE OUTBOUND X10

hey Guys, One of our customers has opted to receive invoices via EDI. We were trying to configure the process. We talk to Partner system thru Gentran.

1. Can we directly configure system such that GENTRAN doesn't have to do any mapping work and we use it as just a FTP machine??

2. As far as I understand, we can just create IDOC type INVOIC out of the system and Gentran should then create the EDI X10 format.