Audio CD file length vs. Data CD file size

Recently completed a Book-on-Disc recoding and edit session. The resulting 118 chapters are ready to burn to CD. As Data CD's they will fit on (2)discs. As Audio CD's it will require (8)discs, since the duration of each chapter fills up the disc quickly using Nero 6 as the burning app. Obviously, we cannot use Data Cd's and we cannot use MP3 files due to the large number of CD players that cannot read them. Any way to get these to fewer discs uding Audio CD's? Any help would be greatly appreciated.