With this application you can change the difficult of the game. More players means harder mobs and better loot, so that's the best way of farming.
How does it work?
Singleplayer:
1. Start the program and set the player number.
2. Start Borderlands and start playing.
3. Press ALT+Q for changing the value.
4. Done!
Multiplayer:
1. Start the program and set the player number.
2. Start Borderlands and start playing alone.
3. Press ALT+Q for scanning, then wait for the other players to join.
4. After everyone joined, press ALT+Q again for changing the value.
5. Done!
Note: every time you save and quit, you have to rescan!