Add this to mission.lst and rebel.lst in the campaign folder.

10
wh.lst
Warhammer Campaign

Copy wh.lst to the campaign folder as well.

Add this to mission.lst and rebel.lst in the Balance of Power train folder.

//
[Rebel Campaign : Warhammer Squadron]
//
1500
* 10 0 warham01.tie
Protect Convoy
1501
* 10 0 warham02.tie
Protect Factories
1502
* 10 0 warham03.tie
Capture Convoy
1503
* 10 0 warham04.tie
Destroy Recon Squadrons
1504
* 10 0 warham05.tie
Recon against Imperial Shipyard
1505
* 10 0 warham06.tie
Feint Attack on Shipyard.
1506
* 10 0 warham07.tie
Convoy Strike
1507
* 10 0 warham08.tie
Communications strike.
1508
* 10 0 warham09.tie
Factory strike.
1509
* 10 0 warham10.tie
Mine Strike
1510
* 10 0 warham11.tie
Defend Defiance
1511
* 10 0 warham12.tie
Military Convoy Strike 
1512
* 10 0 warham13.tie
Base Strike
1513
* 10 0 warham14.tie
Weaken Shipyard Defences.
1514
* 10 0 warham15.tie
Destroy semi-complete SSD