Its not that hard I done about 5 or 6 of them for my road. I used Polly S CSX New Image Blue and Gold and the MS decal that Bob mention.
All you need to know is that the Kato AC44 model as is for CSX is only good for road numbers 2-115, to do 116-173 you will need to get the late AC44 fuel tank from Kato. You could also do 1, 200-301 but you will need the steerable truck sideframe or complete trucks from Steve4's website as well as the late fuel tank. Also only 61, 65, 69, 116, 217, 290, and 295 have been repaited so far for waht can be painted with the Kato shell.