fill color using a script.

I'm trying to create a script in CS5 mac os10.6.8 that will change the fill color of selected pathItems. I need a simple script that will change a selected pathItem to cmyk values 2,3,15,0. I will then select this script and implement the action in a batch of 600 files.

I wish this process could be recorded as an action but when I record the action "add new swatch" I have to manually input the cmyk values, which will take forever for a batch of over 600 files.