move 2 opencart stores and edit some css

I am trying to move two opencart installations and a WHMCS installation from one domain to another (on same server) but i'm having issues and need someone to fix it for me as soon as possible please. Also I need two opencart pages editing (its just html / css you enter via the admin area) so that the sidebar css area has a black or grey padding down the right hand side and also in the css area to lay it out so I can just add a list of key for my sites services. Its essental you have OpenCart and Database expireance and knowlege of moving sites from one domain to another. Any questions then just ask.