Typically, it's this:

1. Underwear (if worn )
2. Hose
3. Shoes
4. Shirt
5. Kilt (since it goes over the shirt tail), kilt pin already attached
6. Belt (if no waistcoat)
7. Sporran
8. Waistcoat (if worn)
9. Jacket (if fly plaid is worn, it is already attached to jacket)
10. Headgear