save each pic and open it up in photoshop
press ctrl+a to select the whole image
then go to edit>define brush preset
then click the brush tool and the brush should be there
click on the brush once and then click on the lil arrow inside a circle and click on save brush and you're done
if you don't understand how to do it i'll do it for you i just didn't feel like opening up photoshop
if you need more i have more
