Disc images with different sizes

[AZ]

Hello everyone.
Looong premise:
DVD2SVCD automates completely (with very good results) the process of extracting and converting the "main" track from a DVD (the movie).
I'm exploring the possibilities to build SVCD backup copies of my DVDs with the entire structure of the DVD: menus, film and extra contents (with the limitations of the

SVCD format).
Using "manual" procedure, I can process the single video/audio tracks, obtaining .mps files with audio and subtitles, design or extract still menus, and assemble them

together, using I-Author.
The tipical result will be:
1st CDR: Main Menu (options: movie, extra menu)
Extra Menu (options: extra track1, extra track2,.....)
Extra track1
Extra track2
Movie (first chunk)
2nd CDR Movie (second chunk)
3rd CDR Movie (last chunk)
In order to obtain the same result with the aid of DVD2SVCD, i could launch the program on the first IFO (the movie), and burn only CDR 2 and 3 (the actual assembly of CDR

1 needs manual intervention - apart from menus, often IFOs refer to more than one extra track, and I have to clip the tracks using DVD2AVI, but I could use the first movie chunk created by DVD2SVCD ["don't delete any files" option]).
Unfortunately, DVD2SVCD will create all movie chunks (except for the last) with the maximum size for a CDR, as specified on "Bitrate" tab.

Finally, this is my question:
How can I obtain disc images (and subsequently movie chunks) with different (specified) sizes?

Thanks.

[Mozart]

type the desired CD size in the box "cd size", which you can find in bitrate tab.

[AZ]

Thanks for the answer.
I think this will not solve completely my problem.
Suppose I have a movie of 1.4 Gb, and extra contents of about 500 Mb; to "fill" first CDR I can set the size of 240 Mb in the bitrate tab, but I think I will obtain 6 images, each one of 240 Mb.
I would like to have - instead - the first image (240 Mb), plus image 2 (740) and image 3 (the remaining chunk - about 420 Mb).