How do I edit the appearance of Lyon to 100%?

[LSSpam]

I just went through the 1861 start 3 times trying to get Lyon to appear. I'd rather not leave it to chance, so what do I need to do to make sure he appears?

[LSSpam]

in the events/USA Events file

SelectFaction = $USA
SelectRegion = $Saint Louis, MO
StartEvent = evt_nam_USA_StLouisMassacre1861R|1|2|evt_txt_USA_StLouisMassacre1861R|Event-img_USA_StLouisMassacre1861|$Saint Louis, MO|100

Conditions
MinDate = 1861/05/10
MaxDate = 1861/07/15
EvalEvent = evt_nam_USA_StLouisMassacre1861M;=;0
Probability = 75

Actions
DescEvent = evt_desc_USA_StLouisMassacre1861R
ChangeLoyaltyFac = $MO;-20
SelectRegion = $Saint Louis, MO
ChangeLoyaltyFac = -10

ChgEvtOccurs = evt_nam_USA_MissouriForcePool;cuOccurs;1

SelectFaction = $USA
SelectRegion = $Saint Louis, MO
CreateGroup
Posture = $Defensive
SetKind = $Land
Entranch = 0
InCS = 0
FixType = 0
SetName = _genName
Apply
CreateUnit
SetType = $uni_USA_Lyon
SetName = Nathaniel Lyon
Apply
CreateUnit
SetType = $uni_USA_Cav1IA
FlavorName = Capt. N. Lyon
SUFlavorName = Lyon Cavalry Rgt
SetLevel = 1
SetName = Lyon Cavalry Rgt
Apply
CreateUnit
SetType = $uni_USA_VolBde
FlavorName = Col.J. Jamison
SUFlavorName = 1st MO Vol.|2nd MO Vol.|Missouri Rifles
SetLevel = 1
SetName = 2nd MO Brigade
Apply
ChangeUnitPool = $uni_USA_Bde3MO;4
ChangeUnitPool = $uni_USA_Bde10MO;4
ChangeUnitPool = $uni_USA_Shp1MO;2
ChangeUnitPool = $uni_USA_Art1MO;3
ChangeUnitPool = $uni_USA_Art3MO;6
ChangeUnitPool = $uni_USA_Sup1MO;8
ChangeUnitPool = $uni_USA_Bat1MO;6
ChangeUnitPool = $uni_USA_Mil1MO;10

Change that to 100?

Probability = 100

Would that be all I have to do (without screwing the game up)?

[PBBoeye]

Believe so. Copy the original event file, alter and test.