Just a heads up, the updater might actually require you to download all of the content again anyway. This is due to having to move the files to a new server (thus potentially losing the date and time info that the updater uses to determine what content has been updated). It was out of our hands, really, and I apologize in advance for the inconvenience.
However, the updater should already contain a bunch of quick fixes that will make the wait a little more bearable. We're hoping to put out a 1.5 update in just a month or two, as well, that will make the updater route worth it as you won't have to download all of the haks again.
I should also apologize for Pstemarie's... optimistic analysis of the time it'd take
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