Changing hosting domain

Hi, we are a small company in Europe, and have a plesk panel, v8.3 and need to move to a new domaijn name with different extensions (.com, .net, .org, etc). We understand the "alias" option, that is a perfect way to avoid re-configuring out emails clients (outlook). Just adding the aliases will use the same mailbiox for every domain inside out plesk hosting, but we need to know how to move slowly the domain name from the old name to the new one. First we need to forward some subdirectories, and later the main root webpage. We know maybe this is not possible to do this in the same panel, that's why we have also a cpanel ready to use account. We are also thinking about to use international sufixes for using different languages in the future, depending of the source of the IP connection, for example: [login to view URL] [login to view URL] [login to view URL] We want something simply, effective and cheap. Sorry for my english, I know is not the best, but I think you can understand me. Thanks in advance :)