I linked to the character motor script in my post at the bottom
Yes you can control scripts with Playmaker by using the "set property" action amongst a few others like "call method"
What you can do is use a "get axis vector" action to get your movement vector3 variable- then you can use that variable with "set property" on a player movement script like the character motor and send the vector to the script- then you will be using the script to control the player-
The script has a jump- so you would use set property to access that as well- there's other threads here about using the character motor with Playmaker as well