Bukkit

World Name: world
# ghasts will only spawn on the world named here
Ghasts per player: 6
# the number of ghast spawn attempts on each target
Spawn extra Ghasts at night?: true
# if enabled, uses the same algorithm as normal but ON TOP of the normal one with its own settings after the sun goes down.
Spawn silverfish in explosions?: true
# if enabled, ghast explosions have a chance to spawn silverfish.
# While enabled, this plugin make silverfish immune to fire and explosion damage,
# as well as making them explode on death :)
Explosion radius (Edit carefully): 2
#The explosion power for ghasts, not recommended to change this
Percent chance of spawning a Ghast: 10.0
# percent chance that one of the passes as set above will actually spawn
Percent chance of spawning extra Ghasts at night: 10.0
# see above, night algorithm
Percent chance of spawning a silverfish in an explosion: 33.0
Nightmare mode multiplier: 10.0
# % value to increase spawns per period, IE: mult 10.0 results in 100->110, 110->121, 121->133
Minimum spawn distance: 50
Maximum spawn distance: 90
# distance in blocks from the selected player to spawn
Always spawn period: 120000
Night spawn period: 120000
# time between spawn runs, in milliseconds. Default 2 minutes.
Nightmare mode period: 600000
# how often the average spawn number should be increased, default 10 minutes