Dux Mare

Does anyone know if it is possible to have more than a 2 hr and 15min battle? The parameters only seem to allow for 2 hours as max game time and then a variable length of time of 15 minutes max. Is there a way to change this? I tried altering it manually using .NET but it seems that the file types are a proprietary type only used in ICQ. Any help anyone could give would be greatly appreciated.