Okay, first: I am a Registered Nurse (not MD, EMT, or Paramedic)
I was certified to work under an MD's direction, either directly or indirectly.
1. Nope, don't know how, wouldn't attempt to try it.
2. No, because it just doesn't make sense. You won't get a sterile environment, I probably wouldn't have antibiotics to give, and a good bandaging job will give better results "in the field".
I can place arterial and venous catheters in premature babies, in the hospital, with sterile equipment and sedation if needed. No way does this translate into the experience necessary to suture someone outside the hospital setting.