Help with Hostgator

Ok so here it goes....this is probably an easy question for most of you but...

I signed up for Hostgator at the beginning of the week. I purchased the Baby Account. I setup a domain and added 10 more addon domains. I uploaded a very simple one page landing page on the main domain and one of the addon domains. I haven't done anything with the other domains so far.

I realized after setting everything up that I should probably just go for the reseller account. I upgraded to the reseller account. How do I setup the Cpanel account for each domain? Are they just there or what? I'm getting a little lost here.

Also, I have the one addon domain landing page that needs to be moved now. Do I just copy and paste it to the www folder domain name or what? As far as the other add on domains, do I need to move anything there, or are they already setup since I haven't done anything with them?

I'm a little new to this whole hosting account thing and just a little confused. One side note: I am designing the websites with Xsitepro and then uploading the files there.