Read the readme on D2Loader and Onlyer's CD-Key refiller.
It has instructions on how to set it up. I personally use it.
Yea, I'm runnin 2 windows and running andarial bot with a level 89 fire sorc 590 mf and a level 93 blizz sorc on JHJ's with 714 mf (without mercs), found so much in 10 hours it's not funny