preview posts before submition or after

Hi
We currently have a project http://www.adszoom.com that is near complete. We are trying to gather all fields data and let the poster review there info after input. Is there a way to pull in all fields? We tried to use the feature in the form settings but we need to use the redirect instead. Is there a hook and some code written for this we may put in our functions.pep? if so can we have it and instruction!