8.0Gig DVDSP file size. How To Make Smaller?

Question

Just when I keep thinking I'm "finally" done with my project . . . something else comes up. The file size of the project is presently about 8 Gigs. The duplication house I went to suggested NOT having a project of that size, as the media that they would have to use on it would not be as reliable on certain DVD players. They suggested fitting the project to a single 4.7 Gig disk.
Okay so I used compressor to get the following sizes:
Video only track of the film = 2.5 Gigs
Audio track of the film = 741MB
Director Commentary track = 741MB
Video only of Deleted Scene = 173MB
Audio of Deleted Scene = 48 MB
Deleted Scene Commentary = 48MB
The total on all this is about 4.25 Gigs. The problem is that I have to use each video track twice. Once for the commentary and once without the commentary. All and all, and with the necessary menues, etc . . . the project file is at about 8Gigs.
The dupe house said I can use Toast to compress the size of my project, but 1) does anyone know if this compression will constitute a big level of quality loss on the images (it's a DV feature, by the way - not film), and 2) I have Toast Titanium version 6.0. Does this version of Toast even have a compression option?
I would much prefer to be able to minimize the file size in DVDSP itself somehow, rather than doing a blanket compression on the entire disk using Toast (unless some of you know that this would actually work well). Does anyone have any suggestions as to how I can get my project to squeeze into a 4.7 Gig, single layered DVD? I would imagine that a 70 minute feature with one deleted scene and a couple of director commentaries should be pretty standard fare - if not downright easy . . .
I just don't know how to do it.
Any help would be greatly, greatly appreciated.
Thank you very much in advance for all the help and support,
Javier Calderon

Answer 1

Javier72 wrote:
Thanks again, Drew. The audio is aiff. It's at 41 Kh. Is there a specific AC3 format that I should export the audio to? I know/imagine that there are various manners of exporting audio to AC3, so I want to make sure that it's the "right" one, so to speak.
Take a look here on setting up Compressor (not sure which you are running, but general idea)
http://dvdstepbystep.com/qc.php
For AC3 you should set Dialog Normalization to -31 , preprocessing to none and dechecking Copyright Exists and Content is Original also helps prevent glitches and no compression and selections not checked -this description and pictures with the details about 1/2 down page here
http://dvdstepbystep.com/fasttrackover.php
In my first post there are examples of the audio and the .dmg is a project you can download and look at to see how it is done (as for jut about anything in DVD SP there is more than one approach )