Hello guys i was wondering , how all new servers are having interlude files with classic client developed how they want i mean

l2reborn , l2 ovc ,l2 dex , l2 flauron etc has interlude files with classic client  where they found this client or where to buy who is making those clients

i have interlude files already developed i need to addapt classic client to interlude files  but with not all theses extra skills items etc 

 

Classic interlude files = Heavily modified classic Saviors/Zaken , adjusted to interlude features.

to make your already interlude files compatible with the any other client you need to modify all network packets in your core
or
you can achieve the "classic" feeling by adding an interface to your client. Example
or
You can buy ready classic interlude files from the likes of lucera2 and adapt your mods there.