SAP invoice approval workflow

Hi Experts,

Am coming up with an invoice approval workflow using a template and i have two questions,. Please help.

1. There are templates that i have come across during my research, which are WS00400032 and WS20001004. Kindly,what is the difference between the two and which one is the best  to use?
2. I also need to do configurations in SPRO>Financial accounting>Gloobal settings>Documents>Document packing. Ihave noticed that in our system(DEV), we only have Financial Accountiing(new) in the path and in this there are no configuration file in the document packing as shown in attachement below. what could be the matter and how can i go about it?

Best regards.

James.