I had the same problem, so i managed to download the client installer and then update while i was at work.
i got home and copied the entire squareenix directory from my external hard drive i used at work to my PC on which i run FFXI.

here is a torrent of the entire directory, it should work for you. i will seed it for at least the next two days. PLEASE NOTE: i used thepiratebay to host the link, so open it in firefox with noscript, or else you will see some very very NSFW images on the banners on the sides.
http://thepiratebay.se/torrent/9840094