TMPGenc encoding to big

hi, i try to encode 'Herr der Ringe - Die Gefaehrten Special Edition' (2x DVD) to 4 800mb CDs (2x2) (with german & englisch audio 160kbit, 3subtilestreams, KVCD1a matrix and CVD resolution) but if i encode with TMPGenc the resulting file is to big 2x 800MB +1x 250MB :-( how can i fix that? (yes, it is a TMPGenc/DVD2SVCD problem, with CCE i get 2x800mb images)

As per the sticky:

thx. i dont realised that 'Fileprediction Factor' managed the filesize.