From the script instructions:
# Additional info:
#
# If you want to change the value of the SR % ingame use the "Call script"
# event command and use this syntax:
#
# $game_actors[X].sr = Y
#
# X - ID of the hero in the database
# Y - new value of the SR
#
# You can also use another syntax:
#
# $game_party.actors[X].sr = Y
#
# X - position of the hero in the party
# Y - new value of the SR
#
# Note that X starts from 0 and NOT 1. The ammount is shown as 100,0%, this
# is 1000 SR. i.e. 59,1% would be 591 SR.
Just create a common event with a script call. I hope that helps!
EDIT:
Oops, I read EOS as CRLS. Sorry, my fault.
This one is from the EOS instructions:
# Additional info:
#
# If you want to change the value of the OD % ingame use the "Call script"
# event command and use this syntax:
#
# $game_actors[X].overdrive = Y
#
# X - ID of the hero in the database
# Y - new value of the OD
#
# You can also use another syntax:
#
# $game_party.actors[X].overdrive = Y
#
# X - position of the hero in the party
# Y - new value of the OD
#
# Note that X starts from 0 and NOT 1. The amount is shown as 100,0%, this
# is 1000 OD. i.e. 59,1% would be 591 OD.