I prefer my initials as a prefix (like others do). I only use "bat" or "ctf" in my upcoming CyberSpaz pack, like this:



JZCyberCTF1.j2l

JZCyberBat1.j2l (you all know that one, don't you?)



Also, you can indicate none-MP levels with a "-":



JZ-Dungeon.j2l



That "-" key cannot be typed in the "Internet game setup menu".