They are not supposed to be watching you unless they have reasonable suspiscion that you're cheating.
1. How much creatine should I take (I bought Creatine Monohydrate Powder) each day in order to have enough in my urine and not damage my kidney based on the above info? Just take the recommended dose thats on the bottle
2. If I have a really high concentration of electrolytes from sports drinks, will this throw up a red flag? Is it possible for alot of electrolytes to increase the specific gravity or the salt content of the urine past the normal range? I imagine it could but you'd have to drink a lot I think. 40 ounces of gatorade the morning of the UA will be fine.
3. Aspirin upsets my stomach. I couldn't find a very clear explanation of what this is supposed to do for you. I know it thins your blood, but how would that help in a drug test? If this is absolutely necessary, is there something else that I can takeIgnore the aspirin. It used to help for the immunassay tests but thats not true any more.
4. Do I need to drink a different amount of water because I normally don't drink or pee much, or should I be good with the 48 oz?Drink Gatorade.

If you can pickup some cheap thc test strips I would do that to make sure you're clean.
Subbing with synthetic urine can still work for you. Women have a real nice hiding spot that men don't.