jayme did this :D

#include <a_samp>

#define FILTERSCRIPT
#define COLOR_YELLOW 0xFFFF00AA
#define COLOR_BLACK 0x000000FF
#define COLOR_TAN 0xF9EBBFFF
#define COLOR_GOLD 0xEAB91DFF
#if defined FILTERSCRIPT
main()
{

}
public OnFilterScriptInit()
{
print("|______________Sat Nav[FS]_______________|");
print("|___________Created By P1nd3r____________|");
print("|______________(c) 2008__________________|");

return 1;
}

public OnFilterScriptExit()
{
	return 1;
}
public OnPlayerEnterCheckpoint(playerid)
{
	PlayerPlaySound(playerid, 1058, 0.0, 0.0, 0.0);
	DisablePlayerCheckpoint(playerid);
	GameTextForPlayer(playerid, "~w~You have~n~~y~arrived", 5000, 1);
	return 1;
}

#else

main()
{
	print(" Sat Nav[FS] LOADED");
}

#endif


public OnPlayerCommandText(playerid, cmdtext[])
{
	if(strcmp(cmdtext, "/navsyshelp", true) == 0)  
	{
		SendClientMessage(playerid, COLOR_GOLD, "______________________________________________");			
		SendClientMessage(playerid, COLOR_BLACK, "______________________________________________");
		SendClientMessage(playerid, COLOR_YELLOW, ".:NAVSYS - /lspd /bayside /hospital /cityhall /lvap /sfap /lsap /pier /gs");		
		SendClientMessage(playerid, COLOR_YELLOW, ".:NAVSYS - /clear /chill /lvpark /gym /lstower /dmv");		
		return 1;
	}
	if(strcmp(cmdtext, "/lspd", true) == 0)
	{
     	SetPlayerCheckpoint(playerid,1529.6,-1691.2,13.3,4.0);
		GameTextForPlayer(playerid, "~w~Nav SYS set ~g~Los Santos PD", 5000, 1);				
		return 1;
	}	
	if(strcmp(cmdtext, "/bayside", true) == 0)
	{
        SetPlayerCheckpoint(playerid,-2397.7996,2330.2222,4.9844,4.0);
		GameTextForPlayer(playerid, "~w~Nav SYS set ~g~Bayside", 5000, 1);
		return 1;
	}	
	if(strcmp(cmdtext, "/hospital", true) == 0)
	{
		SetPlayerCheckpoint(playerid,2029.5945,-1404.6426,17.2512,4.0);
		GameTextForPlayer(playerid, "~w~Nav SYS set ~g~Hospital", 5000, 1);				
		return 1;
	}
	if(strcmp(cmdtext, "/cityhall", true) == 0)
	{
		SetPlayerCheckpoint(playerid,1480.8416,-1771.8915,18.7958,4.0);
		GameTextForPlayer(playerid, "~w~Nav SYS set ~g~City Hall", 5000, 1);				
		return 1;
	}	
	if(strcmp(cmdtext, "/lvap", true) == 0)
	{
		SetPlayerCheckpoint(playerid,1722.1062,1508.2020,10.8128,4.0);
		GameTextForPlayer(playerid, "~w~Nav SYS set ~g~LV Airport", 5000, 1);				
		return 1;
	}	
	if(strcmp(cmdtext, "/sfap", true) == 0)
	{
		SetPlayerCheckpoint(playerid,-1432.8068,-292.6384,14.0000,4.0);
		GameTextForPlayer(playerid, "~w~Nav SYS set ~g~SF Airport", 5000, 1);				
		return 1;
	}		
	if(strcmp(cmdtext, "/lsap", true) == 0)
	{
		SetPlayerCheckpoint(playerid,1963.7876,-2195.5500,13.5469,4.0);
		GameTextForPlayer(playerid, "~w~Nav SYS set ~g~LS Airport", 5000, 1);				
		return 1;
	}	
	if(strcmp(cmdtext, "/pier", true) == 0)
	{
		SetPlayerCheckpoint(playerid,839.5338,-2057.8774,12.8672,4.0);
		GameTextForPlayer(playerid, "~w~Nav SYS set ~g~LS pier", 5000, 1);				
		return 1;
	}		
	if(strcmp(cmdtext, "/gs", true) == 0)
	{
		SetPlayerCheckpoint(playerid,2492.6826,-1674.1060,13.3359,4.0);
		GameTextForPlayer(playerid, "~w~Nav SYS set ~g~Grove Street", 5000, 1);				
		return 1;
	}	
	if(strcmp(cmdtext, "/clear", true) == 0)
	{
		DisablePlayerCheckpoint(playerid);
		GameTextForPlayer(playerid, "~w~Nav SYS ~g~Cleared", 5000, 1);				
		return 1;
	}	
	if(strcmp(cmdtext, "/chill", true) == 0)
	{
		SetPlayerCheckpoint(playerid,-2334.0029,-1632.4867,483.6996,4.0);
		GameTextForPlayer(playerid, "~w~Nav SYS set ~g~Mount Chilliad", 5000, 1);				
		return 1;
	}	
	if(strcmp(cmdtext, "/lvpark", true) == 0)
	{
		SetPlayerCheckpoint(playerid,2325.8726,1393.3669,42.8203,4.0);
		GameTextForPlayer(playerid, "~w~Nav SYS set ~g~LV Parking lot", 5000, 1);				
		return 1;
	}	
	if(strcmp(cmdtext, "/gym", true) == 0)
	{
		SetPlayerCheckpoint(playerid,2267.8606,-1723.5905,13.5469,4.0);
		GameTextForPlayer(playerid, "~w~Nav SYS set ~g~Gym", 5000, 1);				
		return 1;
	}
	if(strcmp(cmdtext, "/lstower", true) == 0)
	{
		SetPlayerCheckpoint(playerid,1558.4553,-1349.3193,329.4609,4.0);
		GameTextForPlayer(playerid, "~w~Nav SYS set ~g~Huge LS tower", 5000, 1);				
		return 1;
	}	
	if(strcmp(cmdtext, "/dmv", true) == 0)
	{
		SetPlayerCheckpoint(playerid,-2056.9275,-80.1014,35.3203,4.0);
		GameTextForPlayer(playerid, "~w~Nav SYS set ~g~San Fierro DMV", 5000, 1);				
		return 1;
	}		
	return 0;
}