Please Help Steam Seekers Edition!Follow

Hi, I've been playing the game after a 3year break for about 6weeks now, Im loving it without SoA, so much to do, farm emph items for weapons (mainly ochain & Daur as those jobs MUST have a RME), but its got to the stage where I want to play and be a part of SoA.

I have installed on a hard drive with only a gig or 2 free on that partition the Ultimate abyssea edition.

Now if I buy the Ultimate Seekers Edition (which is obviously heavily reduced for ppl who have the abyssea edition) will I simply get a code to play with SoA or is it more complicated, meaning I might have to completely uninstall FFXI and then DL SoA Seeker Edition and install it like that (if that was the case I'd install it on a larger drive as its currently on an SSD drive of 80GB with Windows for fast boot ups along other things, also if this was the case, which file stores all my macro's?

I will be ever so grateful for any help / advice / experiance someone could offer!