1- open basic.cfg in notepad, scroll down about 3/4 of the way until you reach this header:
;[SUBMARINE_AMMO11];XXI
[SUBMARINE_AMMO10]
Type=3
Version=0
ForeTubes=6
AftTubes=0
ForeResIntern=17
ForeResExtern=0
ForeResExtra=0
AftResIntern=0
AftResExtern=0
ShellSlots=10
NbYears=3 <--------- I think you have to change this to 5
Renown=11
Year0=1943 <--------------change to 1939
ForeTube00=3 ;T1
ForeTube01=3
ForeTube02=3
ForeTube03=3
2- Save your changes and close notepad
3- open Flotilla.cfg in notepad and scroll to the desired flotilla. Using 2cd Flot as example:
Flotilla1=903
TO1=941
NbStartingDate1=6
NbDate1=6
Emblem1=data/Emblems/SubEmblems/Flotillas/2nd flotilla.tga
NbBases1=2
Base1_0=752;Wilhelmshaven
Date1_0_0=1939
Month1_0_0=9
Date1_0_1=1940
Month1_0_1=8
DeparturePointLong1_0=973144.000000
DeparturePointLat1_0=6420906.000000
Heading1_0=65.995003
Base1_1=753;Lorient
Date1_1_0=1940
Month1_1_0=9
Date1_1_1=1944
Month1_1_1=8
DeparturePointLong1_1=-399037.000000
DeparturePointLat1_1=5729694.000000
Heading1_1=135.000000
NbUboats1=2
Uboat1_0=1 <-------- change this to 3 (XXI is 3 in the program)
Uboat1_1=2
Date10=1939
Month10=9
Starting10=Yes
TypeSub10=1; VIIB <-------- change this to 3
I think that is all that's required. Someone else will probably be along shortly and correct any mistakes I've made so wait a bit.
zz