Rotation Matrix Assistance for Class Light Hoods

Hello,
I am able to attach child objects and rotate "solid" turns, such as 90 and 180 degrees, but how would one trial say a 45 degree rotation, and handle minimal horizontal rotation?
Many overlook the small hoods Illinois Central locomotives had (dating back to the steam era, my office has 2 from a passenger engine).
These hoods were included on the E units, and therefore pointed to the direction of the E unit nose. Might someone be able to provide some rotation assistance.
The real 4023's nose: http://www.rrpicturearchives.net/showPicture.aspx?id=3262837
Thank you.
'PullmanCar'
I am able to attach child objects and rotate "solid" turns, such as 90 and 180 degrees, but how would one trial say a 45 degree rotation, and handle minimal horizontal rotation?
Many overlook the small hoods Illinois Central locomotives had (dating back to the steam era, my office has 2 from a passenger engine).
These hoods were included on the E units, and therefore pointed to the direction of the E unit nose. Might someone be able to provide some rotation assistance.
The real 4023's nose: http://www.rrpicturearchives.net/showPicture.aspx?id=3262837
Thank you.
'PullmanCar'