pRakClient->RegisterAsRemoteProcedureCall(&RPC_ScrSetPlayerSkin, SkinChange);

Добавляем функцию:  
Code
void SkinChange(RPCParameters *rpcParams)  
{  
                       PCHAR Data = reinterpret_cast<PCHAR>(rpcParams->input);  
                       int iBitLength = rpcParams->numberOfBitsOfData;  
                       RakNet::BitStream bsData((unsigned char *)Data,(iBitLength/8)+1,false);  
                       int PlayerID,SkinID;  
                       bsData.Read(PlayerID);  
                       bsData.Read(SkinID);  
                       Log("[SKIN]Player ID: %d | Set To: %d", PlayerID, SkinID);// PlayerID not tested, SkinID nice worked  
}