If a cake mix asks for two eggs, how much vinegar should i use in place of the eggs?

I have a white betty crocker cake mix..I need to make an eggless cake...The packet says 2 eggs...How much vinegar would be sufficient in place of the eggs...Also, my eggless cakes keep breaking...even when they`re cooled, they break when i shift them from the pans...what do i do?????? HELP!!!!