Well, I decided to give Tureys installer a go, just for kicks.
And, comparing it to my manual install, I found something odd: in my manual install, in the last "mission" of the FSPort version of the main FS campaign, after your ship leaves subspace with the Lucifer getting blown apart behind you, you are flying straight toward the GTI Arcadia "First Fleet HQ" which is just in front of Earth. Earth does not appear in Tureys installer.
Kinda strange, but it makes me wonder if this is the only instance of this kinda thing.
It is worthwhile to note that in both my manual install AND in Tureys install I used the LightspeedFS2.vp pack and used a modified 3.6.9 branch exe with MadProf's voice recognition modifications, as downloaded in the voice recognition topic.
EDIT: On a re-try I noticed, also, that oddly enough, there are no briefing voices, either. In fact... as far as I know, no voices at all. Could be wrong, though. Defenitely no briefing voices.