I've made some changes to the way both mod.tbl and message.tbl work that might affect some mods so I just wanted to give everyone a heads up.
Basically I've moved the Praise Self settings from mod.tbl to message.tbl and altered the code to expose several hardcoded options that allow modders to choose how often builtin messages are sent.
AFAIK the Praise Self settings have never been used in any released campaigns so I simply removed them (meaning that any campaign using them will break) but if they have been used I'll change things again so that mod.tbl won't choke on them. For unreleased mods, please update as I'm about to describe.
Message.tbl now has a new section which goes right at the top before #Personas
#Message Frequencies
$Name: Praise Self
+Occurrence Chance: 10
+Maximum Count: 5
+Minimum Delay: 60
#Personas
Name is the name of the builtin message type, the same ones used later on in the table.
Occurrence Chance is the % chance that a message will be sent (For Praise Self, if a wingman gets a kill, for Check, if you have an enemy behind you).
Maximum Count is the maximum number of times you'll hear this message in a single mission.
Minimum Delay is the time that must pass after this builtin message has been sent before another one can appear from any wingman.
Although you can specify all 3 fields for any builtin message only a few of them will have any effect. The changes to maximum count and minimum delay only apply to "Check 6" "Praise" "Praise Self" and "Help". You can only use Occurrence Chance with "Praise Self" at the moment.