OK, this seems genuine.
Let me first say that posting my workouts would be of no help, because I don't train specifically for sprints. Although I am still credible at sprints, I "train" for health and fitness rather than sprint performance.
So in the winter (now), I do lots of 5k/10k treadmill work, as well as interval work as fast as the mill will go, which is now 12 mph. That kind of work is absolutely not conducive to sprint performance, even out to 400m!! Given decent baseline fitness, it will make you much slower in the sprints than your potential might be, because your muscles are trained at a slower rate, which your body "settles into", and which you can't break out of just by willing it to be so.
That is why guys like Farah are lucky to run around 13 FAT, while being distance-trained.
Since you claim to be a middle-distance runner, I'm going to assume that you have more meat on your bones than, say, an average distance runner, without having the body mass or BMI of a sprinter.
I'm also going to assume that you want to fool around in the sprints for a season to see what happens, and not necessarily stick with it.
In keeping with that, and assuming that you don't have all the time in the world to work out, I would suggest that you concentrate mainly on neurology, using the muscle that you already have available. Do shorter, much faster running, and actively stay away from the slow stuff, except for maybe a long SLOW jog once a week just for recovery (think maybe 30-40 mins at something ridiculously slow like 5 mph, just a light jog). Don't typically do anything over 400m, and do much of the work at distances shorter than that.
Sprint drills should accompany the above high-turnover-rate running--A's, B's, step-overs, etc.--with a focus on snapping the leg to the ground, cadence, and a feel for how the body balances during those movements, including where and how the foot contacts the track. This can train your body in WHICH muscles to use in sprinting.
Accelerations are of utmost importance, and given a limited amount of time, they should be HARD, to train recruitment. Don't worry too much about form, worry about applying power to the track and smoothly cycling your power strokes. Of course, don't start out at 100% effort unless you are well-trained in middle-distance, and don't use blocks--use a rolling start, otherwise you will destroy your achilles in short order.
While doing the accelerations, make sure to concentrate on applying power to the track, WHILE KEEPING THE FOOT DORSIFLEXED. You will get some push from your calf and the foot itself, but keep that foot in a power position, and "feel" for the ground--some call it "pawing at the ground". This ensures power application, and actually minimizes injury potential.
Finally, do some upper-body weights when you can, and try to go heavy. Stay away from big squats, cleans, and deadlifts in the early phases, and concentrate on front vertical row, bench, dips, and bicep curls/tricep extensions. It might seem weird to be doing curls, but your legs may very well tend to follow your arms.
For lower body, try step-ups onto a platform instead of squats. When you step up, step up onto the ball of your foot, with it dorsiflexed if possible, rather than onto the "flat" of your foot.
Do these simple things and you will improve your sprinting without having to make a giant investment that will take a long time to pay the big dividends you might see.
Remember: concentrate on power application and position, and quick cycling, to get the basic requirements--then THINK about running "DOWN" the track, about eating up distance. Lots of guys get up high and cycle well and think they're really going somewhere because they're trying hard and it feels good--but really think about covering ground--on your accelerations, look at the ground, first closer to you as you start out, then progressively farther from you as you speed up. When you find yourself looking straight ahead, do maybe 5 more absolute max effort strides, then shut it down, and look where you are on the track. If you're somewhere in the middle of the 100m straight, you're doing OK.
Remember, look at the track, watch it roll under you. Think about climbing up a really steep hill on all fours, or about climbing a pegboard--really try to cover distance along the track surface. Find a long flight of stairs and go up FAST, trying to be really rangey, taking more steps at a time than you think you can. You can start with less, then progress to more as your speed up the stairs increases. Translate that feeling of going up the stairs to the horizontal track surface. Keep the feet cocked.
Also, while doing these things, think about taking creatine if you're into that kind of stuff, and stay well-hydrated.
I don't think stretching is too important in the beginning, unless you are accustomed to it. Active warmup is essential, however, like during the sprint drills.
I've run out of time.