From looking at it, it looks clearly like FoulSoul says the Alexandria Modified Emulator that was released. It has same distinctions to it, eg. with the blank minimap at the top, this was the purpose of the emulator. (iSRO Files + kSRO Map.pk2) to view areas of Alexandria.
To the question ecSRO, swSRO, mySRO, sjSRO cannot do "what he did", as their server files being not theirs are stolen from Joymax's Servers, these Server Files do not contain the source codes to everything, making it very select what you can change only via the database and PK2 edits.
Emulators however are re-replications of the server files from analyzing packets or other methods to create your own source that can be compiled and used.