BTW, apart from the other script: in case someone is interested, here is the bash script that I use from Linux to split long files into chunks of 20 min or less (to circumvent the bug related to long files...)
#!/bin/bash
mkdir ./split
find . -iname "*mp3" | sort | \
while read i; do
echo "$i"
mp3splt -d split -a "$i" 00.00 20.00 40.00 60.00 80.00 100.00 120.00 140.00 160.00 180.00 200.00 220.00 240.00 260.00 280.00 300.00 320.00 340.00 360.00 380.00 400.00 420.00 460.00 480.00 500.00 520.00 540.00 560.00 580.00 600.00
done
It takes no parameters, and you execute it in the folder containing the mp3s. The output is in the folder ./split, and mp3splt is available in Debian's repositories. I hope to forget about this fix in the next version of Nokia Audiobooks...
Regards