Bartender 4 Pet Bar

Hi, I started experimenting with Bartender 4 as I would love to customize my bars. However I stumbled upon one problem. When I want to do daily quests in Icecrown with warhorses and dueling with valiants and champions I am not able to use hotkeys for this. Buttons are arranged in Pet Bar and therefore can not share the same hotkeys as my normal cast bar. I was not able to configure Pet Bar to replace the cast bar so it can use my hotkeys (1 2 3 4 etc.). Is there a way to set it so that when I enter any vehicle (I assume all of these are vehicles) it replaces my cast bar but when I summon pet (shadowfiend) it stays intact? Basically I want to use Bartender to customize my bars but keep blizzards interaction within bars.