In my case it's 4.28GB but there is some margin of error when using percentage conversion, so you can't increase /d44 because you may not fit on DVD5.
On the other hand you may convert them to 1024x576@25fps with 53% of original bitrate to get really smoother fullscreen playback and still fit on DVD5. The problem is it takes much more time.
Anyway you may try - just open
1#resample.rlst in notepad, find and replace ([CTRL] + [H]) all
Code:
/d44 /m3.0 /l-1 /p8 /b8 /c1
with
Code:
/d53 /m3.0 /l-1 /p8 /a25 /(1024 /)576 /b8 /c1