You need to install Node.js on this url https://nodejs.org/dist/v14.17.3/node-v14.17.3-x64.msi
When you have it installed, go to install.bat on the folder and double click on the data.
Go to index.js and add texts or other things to your Discord-Rpc, then save the Index.js data and then you can go to the Start.bat file and start your Discord-Rpc.