Looking at it, I reckon its going to go like this.
Fev Vs Fax = Fax straight to Final
----------------------------------------------------->Fev
--------------------------------------------------------------------------------> Fax
Leigh Vs Batley (3rd V 6th)
------------------------------>Leigh Vs Barrow------> Fev Vs Leigh-------------> Fev Vs Fax
Widnes Vs Barrow (4th v 5th)
Fax Winner's is my Hope 
, Realistically Fev Winners

.