II'm a HUGE Jeff Buckley fan, but rather than give you the cliche "How dare you even attempt to do something as good as Jeff, no one will ever beat him", I'll try to think constructively...
As someone here mentioned, for clean tones, vintage Telecaster into a Fender Vibroverb. Here's a list of Jeff Buckley's gear:
http://www.jeffbuckley.com/rfuller/b...aq/25gear.html
As someone else also mentioned, Bearsville Studios. Probably one of the best studios in North America. My studio partner, who has platinum records hanging on the wall, and one of his best friends (who also has platinum records hanging on the wall). They've both used Bearsville before to record. What you'll need at least is: well maintained Neve 1073's, Urei 1176's, LA2A's, U47's
Then it comes down to the mix - Andy Wallace is one of the best guys at what he does, don't know how to duplicate that 100%, that's all up to you but there were some great threads about Andy Wallace a few months back so you may want to search the archives and see if you can find those posts.