1) When installing the enoch pkg, make sure you select customize so you could pick the USB drive, otherwise it'll install to the default drive which is your internal drive
2) the package you downloaded from voodoo projects is the source file as stated, you need to compile it. Get the pkg file here
3) the copied package to the root of the USB Installer is so you can install it to the installed drive later as part of post installation, you probably didn't get that far yet