#define FLATPATH "Flats/%d.txt"
enum fInfo
{
    FlatID,
    Float:FlatEnterX,
    Float:FlatEnterY,
    Float:FlatEnterZ
};
new FlatInfo[MAX_FLATS][fInfo];

[...]
forward LoadFlats(playerid);
public LoadFlats(playerid)
{
        new flatid;
        flatid = 1; //Tempoary flat ID to test the script
        if(fexist(fFile(flatid))) //if the file with name "1" in Scriptfiles/Flats exists:
        {
          SendClientMessage(playerid,-1,"Attempting to load flat file");
          INI_ParseFile(fFile(flatid), "GenerateFlats", .bExtra = true, .extra = playerid);
        }
        else
        {
            SendClientMessage(playerid,-1,"nope");
        }
        return 1;
}

forward GenerateFlats(flatid, name[],value[]);
public GenerateFlats(flatid, name[],value[]) //Load the float "Enter X" saved in "1.txt" into FlatInfo[flatid][FlatEnterX]
{
    INI_Float("Enter X", FlatInfo[flatid][FlatEnterX]);
    return 1;
}

stock fFile(flatid)
{
    new FlatFile[64];
    format(FlatFile,sizeof(FlatFile),FLATPATH,flatid);
    return FlatFile;
}