And I guess the original creator isn't around anymore so you came to me for help.
Well, whenever I have some time on my hand I'll keep working on them. Once they are all good I'll post them here for evaluation.

Are they original models or are they made by a fan?

I tried around a bit more today and came to the conclusion that the only way for it to really work properly with alpha on would be to use the original bsp.exe
So my current workflow is to import the model from bin into blender and modify the model (that's all done already). Then export it to a .bin file, convert that to an .e file, and then use bsp.exe to create a new .bin file.
Which would all be just fine and dandy if it would just be only that. Unfortunately it seems the models been through bsp.exe already as I got them, and with that they already have plenty of cuts in them. More unfortunate they aren't that cleanly made. So if I just do the convert roulette bsp spews a lot of insults at me and the created .bin file gets a lot of UV map uglities. So for that to not happen I need to invest some time on the model to clean it all up and then throw it at bsp.exe for a clean converting.

I did my test run with the cs3rail4.bin (Yeah, I know you already have a fixed version of that, just did it vor testing). And the attached model would be the final result.

I'm totally fine with doing all the work, but it would take some time for me to finish all the models. But if only this delays the new package, I would say go ahead and release it.

slight bump into this - if it's on the backburner, then I'll probably just ship the current package, the important bit (candle vhots) is already in and the railings can be added whenever available.

Yeah, I haven't checked for the offset problem as that is something I know how to fix.
The other thing is more of a challenge as the model also isn't made that nicely.
I guess I'll need to use the original model creation tool for it to work properly and then the offset thing is a whole other thing anyways.

I see, now I can reproduce the problem. I'll look into finding a solution.

I tried to replicate the error from your screenshots and wasn't able to do it. I tested it on my SS2 installation as I don't have Thief installed, maybe it only shows up in Thief?
Check if this file works better for you, please.
[cs3rail4.bin expired]

yeah, don't worry. ok, not quite there - all models have a different offset, some just a bit, some quite a bit, also the way the rods are attached to the rail part is different, looks like they are sorted differently?
[badrail.jpg expired]
[goodrail.jpg expired]

I know I've added vhots to other candles. But can't remember this kind of candle.

Here are the candles for now.

Could you provide me the textures of the railings, please?

EDIT:
Here's the first batch, re-exported the table and added a vhot to the candles.
As I'm missing the textures I haven't tested it. If something doesn't work provide the textures as well, please

and an add vhot request just for good measure - four custom candles, vhot 0, tip of the wick, would you kindly.

I had a look at in Blender and couldn't spot anything. Does it make any problems except throwing the warning?

no worries, that by itself has a comedic value of its own.

who would have thought one little fixed model would spark so much joy.

all around the Thief-a-verse?

it makes the tip of the lantern yellow. works ok in EP.

probably used for a bunch of other things as well, that's how LG likes to roll.

not going to be a problem when someone decides to create a hires version of that texture. this is the reason for the request, pretty much.

nope, first I've guessed, and then checked.

yes, I did that.

I'm guessing it's using the vanilla handel.gif texture. 16x16, I kid you not.

that will do just fine, thanks as always.
[lanternfixed.png expired]

whatever will make the bottom texture NOT look like that. I'm not picky - all brown? sure. pitch black? still better than stretched stripes.

..it's been a while. @Olfred can you fix the stretched bottom texture on the lantern please?
[lantern.jpg expired]
[lantern.7z expired]

Yeah, I wouldn't remove any vhots, that would be kind of, stupid.

I just saw this. Sorry for the necromancy, but for guaranteed compatibility, add vhots, don't replace them. If it already had vhot 0 and you want vhot 1, just add vhot 1. If it has vhot 1 and you need vhot 0, add vhot 0. There is no issue with overlapping vhots. 

the classic - part of the texture is stretched on the door surface in a bad way (noticeable on the screenshot, just look at the thin tall metal slab with no bolts right under the door vhots). tends to twitch around as you move.

CANDLE2 vhot needs to be moved up a bit, HLAMP even more (old model has no wick, but whatever). also, because of an existing hipoly resource that has been circling around for quite a while now, please make the HLAMP vhot 1 (instead of 0). attaching two more models that have the opposite problem, to make things consistent, their already existing vhot 1 needs to be set to 0.

the rest of the models are looking good.