we got some Miller 280's around 2 or 3 months ago at work. Holy shit, it makes tig welding sooooo much easier then the shit i had from the 60's lol
chris, your going to want a bottle of Argon, and check that you have normal wire and not that shitty flux core crap.
then your gonna want to mildly do a trial and error on some scrap similar to what your planning on welding. i dont have a lincoln machine, so i cant help you to much with settings out of the box, as mine doesnt have the same numbers as yours lol.