Last 2 weeks to the Sundown Marathon

I am down to the last 2 weeks before the Sundown Marathon. Looking at how I have been training so far, obviously it has not been as good as compared to my training intensity for the Stanchart 07. Since this is my maiden attempt to complete my 1st full marathon and it is through the night, my immediate task is to finish it without too much difficulty. Most probably I will try to complete it in about 6.5 hours. Only when I attempt to run the Stanchart Marathon 08 will I then set myself a timing of maybe ???? hrs.