You inject daily subq with an insulin syringe. You can absolutely run it with a AAS stack and you will get more out of your stack by adding HGH.
I've only ever taken 5IU daily of Kits4Less's hgh, people have different responses and ideas for dosing but generally this is something you can run pretty high if you can afford it. A guide i've heard that is arbitrary but gives a good ballpark idea of where to start is 2IU for every 250mgs of steroids. You can adjust up or down from there based on budget and individual response.
Right now post show I am running 5IU HGH daily with 300mg of test per week. So a little above the 2IU per 250mg, but I feel that personally the 5-6IU range is where the most benefit starts to come from, based soley on research and anecdotal reviews, so thats the range I am experimenting with. You may come to the conclusion that 2-3IU is what you want to run.
So to answer your questions clearly, you pin it everyday, subcutaneous with an insulin syringe, you can run it anywhere from as low as 2 to as high as you want really, and you can run it with anabolics. My opinion is start at 5 and see how you feel. My hands are swollen as shit on 5IU and my pumps are great (except lower back). So for me that seems like a potent dose, for you you might not notice or it might be too much. So experiment and see what works for you