[Cesar82]

Originally Posted by gatosky1620

how i do to add the constant "username" in the [IniFileInfo]

try
Open script and edit this line (Insert text in red color and delete blue color part)

function DecodeINI(Line: String): TIniFileInfo;
var
  TmpStr: String;
begin
  TmpStr := Line
  if Copy(TmpStr, Length(TmpStr), 1) <> ';' then
    TmpStr := TmpStr + ';';
  //.....
  if Pos('Value:', TmpStr) <> 0 then begin
    Result.Value := Copy(TmpStr, Pos('Value:', TmpStr) + Length('Value:'), Length(TmpStr));
    Result.Value := ExpandConstant(Trim(Copy(Result.Value, 0, Pos(';', Result.Value) - 1))) + '|';
    StringChange(Result.Value, ' ', '');
    Delete(TmpStr, 1, Pos(';', TmpStr));
    if Pos(LowerCase(ActLangShort + '='), LowerCase(Result.Value)) > 0 then begin
      Result.Value := Result.Value + '|';
      Result.Value := Copy(Result.Value, Pos(LowerCase(ActLangShort + '='), LowerCase(Result.Value)) + Length(ActLangShort + '='), Length(Result.Value));
      Result.Value := Trim(Copy(Result.Value, 0, Pos('|', Result.Value) - 1));
    end else
      if Pos('=', Result.Value) > 0 then
        Result.Value := TranslatorINI(ActLangShort);
  end else
    Result.Value := TranslatorINI(ActLangShort);
  if Pos('Create:', TmpStr) <> 0 then begin

use:

SetIniFile2={app}\steam_emu.ini; Section: Settings; Key: UserName; Value: {username}

I did not test, but I think it works.