Curse

Hunter pet debuffs are not being checked. I would add:
1)demoThreat should also check for:
http://www.wowhead.com/spell=50256
Sure hunters should NOT have a bear pet during a raid, but why not be thorough.
2)tclapThreat should also check for:
http://www.wowhead.com/spell=90314
http://www.wowhead.com/spell=50285

Works for me, but you have to work to configure it.

Here is how I did mine:
Setting up your Prot Template
1. Type /clcinfo
2. On the left hand side choose Template 1.
3. Make sure the "Spec" tab is selected.
4. For label type "Warrior Prot PvE" and click "OK"
5. Set Primary Tree to "Protection"
6. For Distinctive Talent set Tree to "Protection", Talent to "Shockwave", and rank to "1". I don't think warriors really pvp on prot, but if you do you might want to pick a different talent and rank that will differentiate your pve clcinfo from your pvp one.

Make the Grid
7. On the left under Active: Warrior Prot PvE select Grids.
8. Click on Add Grid
9. Select Grid1 on the left.
10. Select the Layout tab.
11. Set Columns to "2" and Rows to "1".
12. Set the Horizontal and Vertical spacing to "0".
13. Set Cell Width and Height to "10".
14. Set Position X to "5" and Position Y to "-153". You can change the settings for step 12 and 13 to suit your UI.
15. Click on the "General" tab.
16. For Label type "Warrior - Protection" and hit "Okay".

Make icons
Add icon for current ability to hit to the grid.
17. Click "Add Icon" 7 (seven) times. This will make 7 icons.

Current Ability button
18. On the left click on the + next to Icons. Select Icon1. It should be preset to have Select Grid set to "Warrior - Protection" and Use skin from Grid.
19. Select the Behavior tab.
20. Under Categories select "Warrior | Protection"
21. Under Templates select "Protection Rotation Skill 1"
22. Click on the General Tab.
23. Set Label to "Current Ability" and hit "Okay".
24. Click on the Grid tab.
25. Set Column to "11", Row to "1", and Width and Height to "6"

Add next ability.
26. On the left select Icon2. It should be preset to have Select Grid set to "Warrior - Protection" and Use skin from Grid.
27. Select the Behavior tab.
28. Under Categories select "Warrior | Protection"
29. Under Templates select "Protection Rotation Skill 2"
30. Click on the General Tab.
31. Set Label to "Next Ability" and hit "Okay".
32. Click on the Grid tab.
33. Set Column to "17", Row to "1", and Width and Height to "4"

Add Inner Rage
34. On the left select Icon3. It should be preset to have Select Grid set to "Warrior - Protection" and Use skin from Grid.
35. Select the Behavior tab.
36. Under Categories select "Warrior"
37. Under Templates select "Inner Rage"
38. Click on the General Tab.
39. Set Label to "Inner Rage" and hit "Okay".
40. Click on the Grid tab.
41. Set Column to "7", Row to "4", and Width and Height to "3"

Add Heroic Strike
42. On the left select Icon4. It should be preset to have Select Grid set to "Warrior - Protection" and Use skin from Grid.
43. Select the Behavior tab.
44. Under Categories select "Warrior"
45. Under Templates select "Heroic Strike"
46. Click on the General Tab.
47. Set Label to "Heroic Strike" and hit "Okay".
48. Click on the Grid tab.
49. Set Column to "7", Row to "1", and Width and Height to "3"

Add Last Stand
50. On the left select Icon5. It should be preset to have Select Grid set to "Warrior - Protection" and Use skin from Grid.
51. Select the Behavior tab.
52. Under Categories select "Warrior | Protection"
53. Under Templates select "Last Stand"
54. Click on the General Tab.
55. Set Label to "Last Stand" and hit "Okay".
56. Click on the Grid tab.
57. Set Column to "1", Row to "4", and Width and Height to "3"

Add Shield Wall
58. On the left select Icon6. It should be preset to have Select Grid set to "Warrior - Protection" and Use skin from Grid.
59. Select the Behavior tab.
60. Under Categories select "Warrior | Protection"
61. Under Templates select "Shield Wall"
62. Click on the General Tab.
63. Set Label to "Shield Wall" and hit "Okay".
64. Click on the Grid tab.
65. Set Column to "1", Row to "1", and Width and Height to "3"

Add Shield Block
66. On the left select Icon7. It should be preset to have Select Grid set to "Warrior - Protection" and Use skin from Grid.
67. Select the Behavior tab.
68. Under Categories select "Warrior | Protection"
69. Under Templates select "Shield Block"
70. Click on the General Tab.
71. Set Label to "Shield Block" and hit "Okay".
72. Click on the Grid tab.
73. Set Column to "4", Row to "1", and Width and Height to "3"

It's single target.  In multi target situations you're on your own and should cleave accordingly.

Heroic strike isn't on the gcd, so go ahead and use the Heroic Strike icon to prompt you when to use it.

Thank you very much for the detailed instructions. I never would have figured this out without your help!

 So this rotation doesn't use sunder or cleave? I'm never getting prompted for heroic strike, either.

Could you post a link to a screenshot of how it's supposed to look?  I think I have it right but I just want to make sure.

Ooops.. step 11 should have rows set to "6" and columns set to "20".

Sorry about that.