To be honest, Radek, I have no idea what you just said.
If I understand correctly, you're on about adjusting settings in the text reader on your PC prior to putting them on your GP2X. If this is the case (and I'm about to try it), I highly doubt this would work as these are settings for your computer, and won't be remembered by the text file.
Edit: Maybe the new firmware sorts out this problem. I shall try that soon. In the mean time - if you save off your files as RTF files - and then rename the file extension to TXT - this should recognise breaks (by inserting some sort of korean-looking character).