[AtItsMax]

pawn Код:

if(pInfo[playerid][ach1] == 1)
    {
    format(string,sizeof(string),"{00FF00}First Cigarette",acheivement());
     ShowPlayerDialog(playerid,92728,DIALOG_STYLE_LIST,"Acheivements",string,"OK","");
    }
    if(pInfo[playerid][ach1] == 0)
    {
    format(string,sizeof(string),"{FFFFFF}First Cigarette",acheivement());
    ShowPlayerDialog(playerid,92728,DIALOG_STYLE_LIST,"Acheivements",string,"OK","");
    }

Now what's wrong with it?
Or you can also use "strcat" for string formatting since formatting using format function is very bad and i do not recommend it.