Slin is not only to be used post workout. It is excellent for a carb up day while recovering. And yes definately use creatine with each slin injection.
I dont know bro until I get more info about you. People that are overweight has caused some insulin resistant so more ALA,inzitol,Cp to make cells sensitive (Glucophage). If you are lean then less slin is needed. You should experiment with the lowest dose possible and raising the iu's but always keep your cells sensitive to slin. Make sure u got some simple sugar w/ u or some orange juice to make sure u dont pass out when feel the symptoms of a low glycemic rxn. Cuss ALA and CP will greatly increase the effectiveness of Slin.