Perks that do something different when a control key is pressed

[LukeH]

Hi,

I try to understand how perks that change what a button does are implemented. I was looking in CK at perks like Silent Roll, Power Bash, Eagle Eye but there's no data shown in the CK editor asociated with them, only requirements and such, no associated effects.

Anyone has an idea how those are made and how can you do something similar?

What I have in mind to do is add a perk that allows running instead of sprint when overencumbered when pressing that button consuming stamina as sprint does. Any idea if something like this is possible with CK and how?

Anyting related to overencumbered situation in CK? how run, sprint, fast travel is disabled in this situation...I can't find.

Thanks