SH3 Campaign editing

Hi guys,
i'm just starting to try editing the campaign files for the first time, and am not sure what some of the convoy lines do, so i'm looking for some advice on how various lines affect what happens.
[RndGroup 163]
GroupName=BRTaskForce_39_01 < first task force in game starting 39?
Category=0 < don't know
CommandEntry=0 < don't know?
Long=-353720.000000 < start longitude
Lat=6733700.000000 < start latitude
Height=0.000000 < Answered in later post
DelayMin=6 < don't know?
DelayMinInterv=1000 < re- spawned every 1000 minutes
SpawnProbability=100 < it's defo gonna be there lol
RandStartRadius=0.000000 < Answere in later post
ReportPosMin=700 < Answered in later post
ReportPosProbability=100 < it's gonna be reported to me
Heading=84.171303 < heading from start position i think
Speed=21.000000 < knots
ColumnsNo=3 < columns
Spacing=500 < columns 500 metres apart
DeleteOnLastWaypoint=true < disappears on last waypoint
CurrentInstanceID=0 < don't know
GameEntryDate=19390801 < convoy spawn date?
GameEntryTime=0 < don't know
GameExitDate=19441220 < no more convoys generated after this?
GameExitTime=0 < don't know
NextWP=0 < don't know

[RndGroup 163.RndUnit 1] < 1st unit in convoy
Type=7 < unit type= heavy cruiser
Origin=British < British
Side=0 < is British side 0 and German side some other different number?
CargoExt=-1 < don't know
CargoInt=-1 < don't know
CfgDate=19390101 < picks a cruiser with an existence date b4 this?
No=1 < 1 unit of this type
Escort=false < not an escort. ie: being escorted
SpawnProbability=100 < defo gonna be created
CrewRating=3 < crew competence? whats the range? 1-5?


These questions have probably been asked b4, but i've not been able to find answers in a search, and i've spent hours pouring over posts.
Is there a guide or a post someone can point me to that explains the holes in my understanding please?
The lines without question marks are what i have/ or think i have found out so far.