How to use FXTHeader.mqh to change MAXLOTS or MINLOTS ?

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Hi All :)
I'd like to change some fixed values in FXT file for backtesting purpouse. I found that it could be used the FXTHeader.mqh file 'FXTHeader' but i don't understand how to use it.
For example if I want to change the MAXLOTS, is ok to do in this way ? 

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void WriteHeader(int handle,string symbol,int period,int start_bar)
  {
//---- FXT file header
   s_symbol=symbol;
   i_period=period;
   i_bars=0;
   s_currency=StringSubstr(s_symbol,0,3);
   i_spread=MarketInfo(s_symbol,MODE_SPREAD);
   i_digits=Digits;
   d_point=Point;
   i_lot_min=MarketInfo(s_symbol,MODE_MINLOT)*100;

        i_lot_max= 10000; //MarketInfo(s_symbol,MODE_MAXLOT)*100; 

   i_lot_step=MarketInfo(s_symbol,MODE_LOTSTEP)*100;
   i_stops_level=MarketInfo(s_symbol,MODE_STOPLEVEL);
   d_contract_size=MarketInfo(s_symbol,MODE_LOTSIZE);
   d_tick_value=MarketInfo(s_symbol,MODE_TICKVALUE);
   d_tick_size=MarketInfo(s_symbol,MODE_TICKSIZE);
   i_profit_mode=MarketInfo(s_symbol,MODE_PROFITCALCMODE);
   i_swap_type=MarketInfo(s_symbol,MODE_SWAPTYPE);
   d_swap_long=MarketInfo(s_symbol,MODE_SWAPLONG);
   d_swap_short=MarketInfo(s_symbol,MODE_SWAPSHORT);
   i_free_margin_mode=AccountFreeMarginMode();
   i_margin_mode=MarketInfo(s_symbol,MODE_MARGINCALCMODE);
   i_margin_stopout=AccountStopoutLevel();
   i_margin_stopout_mode=AccountStopoutMode();
   d_margin_initial=MarketInfo(s_symbol,MODE_MARGININIT);
   d_margin_maintenance=MarketInfo(s_symbol,MODE_MARGINMAINTENANCE);
   d_margin_hedged=MarketInfo(s_symbol,MODE_MARGINHEDGED);
   s_margin_currency=StringSubstr(s_symbol,0,3);
   i_from_bar=start_bar;
   i_start_period[0]=start_bar;
//----
   FileWriteInteger(handle, i_version, LONG_VALUE);
   FileWriteString(handle, s_copyright, 64);
   FileWriteString(handle, s_symbol, 12);
   FileWriteInteger(handle, i_period, LONG_VALUE);
   FileWriteInteger(handle, i_model, LONG_VALUE);
   FileWriteInteger(handle, i_bars, LONG_VALUE);
   FileWriteInteger(handle, t_fromdate, LONG_VALUE);
   FileWriteInteger(handle, t_todate, LONG_VALUE);
   FileWriteInteger(handle, 0, LONG_VALUE);                // alignment to 8 bytes
   FileWriteDouble(handle, d_modelquality, DOUBLE_VALUE);
   FileWriteString(handle, s_currency, 12);
   FileWriteInteger(handle, i_spread, LONG_VALUE);
   FileWriteInteger(handle, i_digits, LONG_VALUE);
   FileWriteInteger(handle, 0, LONG_VALUE);                // alignment to 8 bytes
   FileWriteDouble(handle, d_point, DOUBLE_VALUE);
   FileWriteInteger(handle, i_lot_min, LONG_VALUE);
   FileWriteInteger(handle, i_lot_max, LONG_VALUE);
   FileWriteInteger(handle, i_lot_step, LONG_VALUE);
   FileWriteInteger(handle, i_stops_level, LONG_VALUE);
   FileWriteInteger(handle, b_gtc_pendings, LONG_VALUE);
   FileWriteInteger(handle, 0, LONG_VALUE);                // alignment to 8 bytes
   FileWriteDouble(handle, d_contract_size, DOUBLE_VALUE);
   FileWriteDouble(handle, d_tick_value, DOUBLE_VALUE);
   FileWriteDouble(handle, d_tick_size, DOUBLE_VALUE);
   FileWriteInteger(handle, i_profit_mode, LONG_VALUE);
   FileWriteInteger(handle, b_swap_enable, LONG_VALUE);
   FileWriteInteger(handle, i_swap_type, LONG_VALUE);
   FileWriteInteger(handle, 0, LONG_VALUE);                // alignment to 8 bytes
   FileWriteDouble(handle, d_swap_long, DOUBLE_VALUE);
   FileWriteDouble(handle, d_swap_short, DOUBLE_VALUE);
   FileWriteInteger(handle, i_swap_rollover3days, LONG_VALUE);
   FileWriteInteger(handle, i_leverage, LONG_VALUE);
   FileWriteInteger(handle, i_free_margin_mode, LONG_VALUE);
   FileWriteInteger(handle, i_margin_mode, LONG_VALUE);
   FileWriteInteger(handle, i_margin_stopout, LONG_VALUE);
   FileWriteInteger(handle, i_margin_stopout_mode, LONG_VALUE);
   FileWriteDouble(handle, d_margin_initial, DOUBLE_VALUE);
   FileWriteDouble(handle, d_margin_maintenance, DOUBLE_VALUE);
   FileWriteDouble(handle, d_margin_hedged, DOUBLE_VALUE);
   FileWriteDouble(handle, d_margin_divider, DOUBLE_VALUE);
   FileWriteString(handle, s_margin_currency, 12);
   FileWriteInteger(handle, 0, LONG_VALUE);                // alignment to 8 bytes
   FileWriteDouble(handle, d_comm_base, DOUBLE_VALUE);
   FileWriteInteger(handle, i_comm_type, LONG_VALUE);
   FileWriteInteger(handle, i_comm_lots, LONG_VALUE);
   FileWriteInteger(handle, i_from_bar, LONG_VALUE);
   FileWriteInteger(handle, i_to_bar, LONG_VALUE);
   FileWriteArray(handle, i_start_period, 0, 6);
   FileWriteInteger(handle, i_from, LONG_VALUE);
   FileWriteInteger(handle, i_to, LONG_VALUE);
   FileWriteArray(handle, i_reserved, 0, 62);
  }
And if this changes is ok , what I have to do in order to save this changes into FXT files?


thx :)
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