PreAssembly:
  Parts ID (here)
  WallSet parts orientation
  Paint (first coat) & Sand
Assembly:
  WallSets
  Windows (here)
  Finish painting
  Installation
Wall Cutout

  Oscillating Saw
  Utility knife
Customization Q&A

More: (techniques that apply)
  Installation (JM1065)
  Window assembly (JM1065)
  Bay Facia Trim

JM22 Window Assembly Click on the display photo
for a larger, printable image
Slideshows support but do not replace the instructions