New Website On Faa With My Old Domain-name

I already have my own website with a different host than FAA. (www.ezfineart.com ).
My actual home-page is a slideshow.
I understand if I activated for a Premium membership with FAA, I can use this domain-name (www.ezfineart.com ), hosted by FAA, plus the website I already have in FAA.
1) Can I use FAA a flash-free slideshow in my home-page in this new website hosted by FAA?
I am not going to need all the other content in my old website, because I am going to move all the content to my website in FAA (edgard.fineartamerica.com). But I will still use my my actual domain-name (www.ezfineart.com).
2) How will I link my new FAA home-page (www.ezfineart.com), with my actual website in FAA (edgard.zamalloa.fineartamerica.com) to have all the functions I already have plus the new Premium functions I am going to get? Keeping my old domain name.
3) Do I have to tell my actual Domain-name company about the change I am going to do? To FAA?
4) In the non-crop options, there are 3 sizes. Which one do I have choose?
5) Where do I can find the ‘marketing widgets page’ on my FAA member website?