Opening and editing huge text files on Windows
On Linux its very simple.
If you use Windows, you can do it with the editor of Total Commander (F3/F4).
We edited a 600MB size text file.
Or you can use these free progs as well:
PSPad - http://www.pspad.com
Context - http://www.contexteditor.org
PilotEdit Lite - Advanced Text Editor That Can Handle Files Larger Than 50 GB
Far Manager - http://www.farmanager.com/download.php?l=en
alternative link download