Calcifer

You don't open it. You just drag the chapter file on the .exe. FEAST is the one where you open it. But FEST is where you just drag the file on to it. FEST will automatically decompress the file. You can use either FEAST or FEST its the same thing. You can download the latest version of FEST here. Just drag the file on to FEST.

You're suppose to drag the Chapter file onto FEST. It will automatically convert it.

It seems that the Sniper class doesn't work in the Save Editor. Every time I try to change someone into the Sniper class the editor puts them in the Archer class. And anyone already in the Sniper class it just shows a blank space in the editor.

Is the guide in the original post the current way to ROM hack? I'm just wondering if there's a better and efficient way to ROM hack Fire Emblem.