first, get a really dull drawknife and a 6 foot section of PVC pipe at least 6 in dia. secure the pipe for a work surface and use the draw knife to remove as much of the meat and membrane as possible. Draw knife or other knife must be so dull that you could never cut yourself with it- kinda like a butter knife without serrations.
next, soak the hide in plain water. check daily to see if the hair will pull out with ease. when it does, scrape the hair side and rescrape the flesh side.stretch and tack it to a wall or plywood to dry.