Okay, so today already...
The file splitter is called TextWedge and you can download it from this location:
http://sourceforge.net/projects/textwedge/
Attaching:
"blank" TXT file with numbers from 001 to 999 separated by empty lines
et051.txt - file with names (and some descriptions) to the slovakian OOB
et051xxx.zip - contains a complete encyclopaedia files for units used by obat051 Slovakia
I think this tool might come in handy to any OOB modder who wants to add a bit of in-game info to his units.
As to the formatting, as I wrote above, seems to be 53 chars x 25 lines max (tried it out at lowest resolution, didn't try whether higher res offers more space) and first line should be empty (ie just * at the beginning) IOT not overlap with other texts in Unit Information window.