Help Server And Client Selection

[Alex13xD]

Hello guys, at the moment I have a Freya server with some Grand Crusade equipment and maps and ofc using a Freya client.
I want to use the new interface from official and if it's possible it run under the ready server I had made.
I searched over the internet and I found a lot of ways (hard or just time draining).
So I'm asking for your help what's the best way doing it, I'm about to start making an Ertheia server and I think it's working with classic client or something like that. :poker face:   

[SweeTs]

There is no easy way to achieve that, without proper knowledge you won't achieve it on your own. Also, there is no need to create few topics for that, as far as I remember you already created one, in proper section.

[Alex13xD]

There is no easy way to achieve that, without proper knowledge you won't achieve it on your own. Also, there is no need to create few topics for that, as far as I remember you already created one, in proper section.

what you suggest me to do? start from zero with Etheria server or it's a way to make my server multi-client?