for Windows:
rAthena\src\custom\defines_pre.h
#define PACKETVER 20170517
for Linux:
run the following command
./configure --enable-packetver=20170517
rAthena\src\map\clif_packetdb.h (the packets not completely work 100% so if you have problem post it here maybe someone will help you fix it)
(this already added to official rathena no need to add it manually anymore)
EDIT: packets can be find here >> https://github.com/rathena/rathena/blob/master/src/map/clif_shuffle.h#L3386
for old rathena that use packet_db.txt
work diff (Disable Game Guard NOT NEEDED) >> make in mind that nemo dose not support this client yet so you may have some problem enable some of the other options
EDIT : i suggest using this nemo thanks to secret
those options will make the client work you can add more as you want
9 Disable 1rag1 type parameters (Recommended)
13 Disable Ragexe Filename Check (Recommended)
19 Enable Title Bar Menu
33 Always Call SelectKoreaClientInfo() (Recommended)
35 Read Data Folder First
37 Read questid2display.txt (Recommended)
38 Remove Gravity Ads (Recommended)
39 Remove Gravity Logo (Recommended)
40 Restore Login Window (Recommended)
41 Disable Nagle Algorithm (Recommended)
46 Use Normal Guild Brackets (Recommended)
48 Use Plain Text Descriptions (Recommended)
49 Enable Multiple GRFs (Recommended)
53 Use Ascii on All LangTypes (Recommended)
64 @ Bug Fix (Recommended)
65 Load Custom lua file instead of iteminfo*.lub (Recommended)
73 Remove Hourly Announce (Recommended)
84 Remove Serial Display (Recommended)
90 Enable DNS Support (Recommended)
97 Cancel to Login Window (Recommended)
213 Disable Help Message on Login (Recommended)
you need to update your kro client!!
2017-05-17aRagexeRE.zip
the packet uncompleted and rathena not support this client yet , i suggest not using this client for servers that opened for players