Mudman.. just remove the PVT cover and the belt will slip off one pulley, then the other.. install is the reverse order of removal.... its easy....
If you are moving slow, frequently stopping and starting.. tight turning trails, mud, hills, pulling, anything that requires significant amounts of torque.. SHIFT TO LOW..
I run LOW all the time.. very rarely will I shift to high range.. When I do hit long stretches where High might be useful.. I realize that ove the next mile. its gonna get back in the mud so I just keep it at a moderate RPM and cruise on over...