FP45's;
Santa Fe Warbonnet:

Something with the proportion looks wrong. I think it may be the front steps or something. Looks a bit too small down there, I dunno. Also, the Cigar-brand logo and the Blomberg trucks gave me hell trying to get looking right. I just can't draw or sprite EMDs at all.
Generitrak:

You see, in 2011 or so, I was doing an illustration for an art contest, in which I couldn't use copyrighted images, and I didn't want to risk using the "Amtrak" scheme or logos, so I made up the fictional "Generitrak". Fast forward to this school year in August, where I was doing a sketch in my journal of this engine, to which my school friend named it "Generitrak, the Communist Train". From that point onwards the name stuck and it's become a crazy in-joke.
EDIT: More schemes;
Santa Fe Yellowbonnet (Fictional):

Santa Fe Bluebonnet (Fictional):

Amtrak:

F45's;
Santa Fe Freight:

Ditto:

I hate it when people call F45's "FP45s". You can see where Santa Fe cut off the last few feet of the engine and shortened it.
Kodachrome:

I like the nickname "
Shouldn't
Paint
So
Fast"
Burlington Northern:

I like BN's locomotives. In fact, I didn't know they owned F45s until recently.
CB&Q:

Okay, so the Q didn't own F45s. This is probably what a CB&Q heritage unit would look like if it were an F45 owned by BN.