The job isn't complicated, but it's very time consuming, especially if you have to remove a lot of rivets. If you do, replace with stainless, they will take more abuse than regular steel or aluminum.
The heat exchangers under the running board are supposed to help keep the running board free of snow. They don't work that well at doing that, but if you do start overheating, you can pile some snow on the top of the running boards and that helps cool the exchangers from the top side.
Take lots of pics as you go, especially as you disassemble the broke sled. It's amazing how quickly you forget how things go together. A picture or 10 can save you tons of grief!
2007 RMK 700, 2008 RMK 600, 1995 AC Prowler 2-up, 1980? AC Cheetah