Seawolf is right. Find a gym, talk to a trainer. Or find someone at the exercise & sport science dept at the nearest uni that has one. For my money, you have ~0% chance of knocking your time down that much, even in two weeks. Killing yourself over two weeks is only going to make it worse.
If it were me, I would run 1.5-2 mi 4x the first week, ~3x the second week. Rest completely one or even two days before the PRT. Get plenty of carbs that morning, but don't run the PRT on a full stomach. Know what the Good-Low mark is for PU and CU and don't go too far over (but try to beat the min by at least 1 or 2). Be warm and stretched, but don't waste energy on your warm up. Pace yourself, breathe, maintain perfect running form, and gut it out the last 2 laps. Think of Steve Prefontaine. It's not about running ability, it's about pain tolerance. You only have to do this one once. Work on your overall ability later.
Anyone have a better idea?