Utilities: Text File Splitter
Textwedge is a portable text file splitter. Text splitters have various uses, but they are invaluable if you have an iPod and love to read ebooks due to the 4 KB file size limitations it imposes.
How to Split eBooks for your iPod
Step 1: Open up Textwedge and select Dialogs from the main menu.
Step 2: In the Dialogs menu, select Configure Standard Splitting.
Step 3: In the dialog box, enter 4000 bytes in the Maximum chunk sizes text box.
Step 4: Now you’re ready to load and split a file. To do that, select Load & Split from the File menu.