It's better to post those, to avoid another useless instructions.
Because there is no guide around, then I'll give a lil bit instructions how to make those client works.
Because you're using RagexeRE client follow this steps:
1. Open src\char\char_clif.c , go to line 307 then change this
#if false && PACKETVER >= 20151001
to this
#if true && PACKETVER >= 20151001
2. Open src\common\utils.c , go to line 409 then change this
else if(date >= 20151104) return 55;
to this:
else if(date < 20160203) return 55;
else if(date >= 20160203) return 56;
3. Open src\map\clif.h , go to line 39 then change MAX_PACKET_VER to 56
4. Clean compile