Global PERS Tool Data


we have a S4C+ controller with  an IR6400 robot, we actually use around 20 different programs modules with different routines but they all contain the same PERS tool data. My understanding is that at the moment the tool data for the tool we use is loaded when the program is loaded.

The problem with this setup is that if we change the tool, I need to change all the 20  program files by updating the tool data with the new parameters.
Is there a way I can save the tool data in a global file and delete it from the program file?
maybe in a system file like the tool0 ?