I'm not sure exactly what you want to do, but if you want to be able to pre-focus on the first remote click and shoot a picture on the next, then try running this script:
@title focus then shoot
rem this waits for a remote pulse, then does a half press
rem then it waits for the next remote pulse before it shoots
while 1
do
a = get_usb_power
until a>0
press "shoot_half"
do
a = get_usb_power
until a>0
press "shoot_full"
wend
end
