i dont think you're supposed to spot inject ghrp. you can spot inject MGF, IGF, or regular HGH but i dont think cjc or ghrp are supposed to be spot injected as they are instended to force your pituitary gland to release its own HGH.
To answer the other question yes i do honestly believe it will help heal your injury. I had slight but very painful damage to my rotator cuff that i injured last april. I did nothing all summer and still had sever pain when trying to do anything in september at the gym i got on GHRP and CJC 2-3 times a day in october i very slowly worked my way up at the gym while take the peptides and by xmas i was 100% healed.