[ExeC]

At the top of your gamemode:

pawn Code:

#define HName1 "Hostname 1"
#define HName2 "Hostname 2"

Under OnGameModeInit:

pawn Code:

SetTimer("HNChange", 5000, 0);

At the bottom of your gamemode:

pawn Code:

forward HNChange();
public HNChange()
{
     new str[128];
     format(str, sizeof(str), "hostname %s", HName1");
     SendRconCommand(str);
     SetTimer("HNChange2", 5000, 0);
}

pawn Code:

forward HNChange2();
public HNChange2()
{
     new str[128];
     format(str, sizeof(str), "hostname %s", HName2");
     SendRconCommand(str);
     SetTimer("HNChange", 5000, 0);
}

(Dunno how old this topic was, because I was just searching something and found this...)