I trained for the 400M dash in HS and it was right after I enlisted that I had my best PRT times. Even when I was running 17 minute 5K's, my PRT times were better when I was conditioned for the quarter. I also played DB in college, and my PRT times got worse as I conditioned for speed over shorter distances. I also went from 165 pounds at 20 years old to 205 when I was playing college ball. That probably had something to do with it too.
I guess what I am trying to say is that I have trained for a lot of different things, but if you can run the quarter, you can run anything. Run repeat 400's. Do whatever you need to cool down between laps, take about 5 minutes in between if you need to but do the entire lap balls out. You can even train some overdistance, 500 meters or so, but SPRINT. If you get to the point where you can run 400 meters 6 times under a minute each for a workout, you will not have any trouble getting gassed over a mile and a half.
Again, 2 weeks may not be enough time. A month may have been. You can probably still make it though.
