Hi, sorry if this has been asked before but I don't see it. Here is my situation. I have a stock 2G iPhone and want to jailbreak only. Sometimes when I sync my phone with iTunes it will create a backup. Now if I jailbreak and then connect to iTunes and my phone decides to back up, will it overwrite my "stock" backup and prevent me from cleanly restoring my iPhone to original if I want to do that? Also, I was reading the tutorial from iClarified about jailbreaking and in step 11 it asks for a user name and password. I don't use a windows password, if I leave that field blank will it still work? Finally one last thing. Will I lose my contacts list from jailbreaking or reverting back to original from a jailbreak? Thanks for any help. I am very new to modifying phones!