No, this isn't packaging redirection, this is packet manipulation, and modification.
We change the info in the packet to a custom server, and as I said won't disconnect the PS3. The PS3 does not verify with the server that SSL packet. The one that contains the "*.*.*.dl.playstation.net" information.
We need to live-edit this, and the playstation would let us download whatever we want from our own server *with name verification*
So if we have an ALREADY SIGNED pkg *SONY* - We can easily get the PS3 to download and install it.
We just need to modify the raw packet.
Anyways that's just my 2 cents.