Hi iceman and welcome, of course you need l2walker for gracia as i do and other thousands of ppl but first you should check for same posts and topics like you greated now, don't make just another double topic, i want to inform you that L2walker works great on gracia but you have to pay at the moment www.towalker.com for more details, Crack is not released or founded, i hope somone with the knowledge will do it but we can't request anything because is not easy to be cracked.
You don't need hostfile because there is no exist a l2walker cracked version! if you pay for it you dont need a host file.
Keep in mind to not double post like you did, you can modify your post (it's an option in your up, right window) so it won't get this forum spammed, read the rules i recommend to not download anything you see because some of those files maybe infected with keyloggers,virus,trojans. See the others posts to verify if this walker you are going to download or any file is checked. Use search button if you want to find something it's better for you and for the community.
I hope i solved your questions and welcome again ;)