Hi.
First question: what’s your ultimate goal?.
Now, based on your original message, lets clarify some things.
A) If your version is already 3.0.20204, of course you do not need to install it again since it’s already installed.
B) From the first step in that tutorial (Sync 3.0.20204 EU Apps Package Installation), this is said:
From your message:
APP, not required since you already have it installed based on your comment.
System Voice, you already have it.
Gracenotes, you already have it.
So… what’s our doubt about?.