Size in MB or KB? Poly count?
Probably the most important question here. The highest LOD is 35K polys. I think the LOD goes something like 35,22,15,5 including the trucks. It probably could have been optimized more, but I was getting bored of rebuilding it four times over. It's not for a slow video card, but my A64 3200+, 6800GT (256MB) and 1GB RAM didn't stutter with all five of those in the scene at once, and there are much better cards and processors out there now. I thought of adding even more details, but I didn't want it to get too far out of hand. My C36-7 was 23K polys, which was what I planned this for, but I kept adding things, especially in the truck area. They are 13K polys at the highest LOD, but I think the detail there adds a lot to it.
I'll try to cover as much of the other questions as I can, considering its after midnight here:
It's not on the DLS yet. That could take a little while longer, especially if I add a horn sound. Maybe a couple of more weeks?
No other liverys planned. UP was the only one that had these. This is the 6000 hp unit. I think the one on the Trainz Luvr site is an SD9043MAC (4300 hp). The only real difference is the shape of the engine compartment. There were only 20 or 21 of these built. There were another 40 or so of the SD90MAC - H2 built and CP Rail had a couple of those. At the time I started this I couldn't find a plan for the H2 cab, so I went with the H model.
I don't know how to make the front door open. What it does have, aside from LOD, is dynamic running numbers, bump mapping, and spinning fans. I'll upload both a clean and weathered version. It will be TRS2006 content only. It started out as TRS2004 content, but the fans wouldn't spin, along with some other problems. It sat there for months without much being done on it because of that. When I installed TRS2006 and imported it over, all of a sudden everything worked, so it will stay TRS2006.
As far as creating any more, I'm not sure how may I have left in me. My next project is to re-skin and bump map my old U50C. It doesn't look like it belongs on the same track with this one and my C36-7. Then I'm thinking maybe an SD70Ace. More railroads have that, so I might consider making another skin for that one if it is made.