Hi, and Happy Holidays
I am new to modeling and I have just created my second model. The first one just had three objects (the mesh, lowrez, and collision) and it worked fine. My second one has a lot more objects. When I place it in ZeroEditor, it shows up normally, but when I load it in-game, it is rotated 90 degrees sideways. Does anyone know how to fix this?
Thanks.

before you export the model, select every part of it, click on the "transforms"-button and select: "freeze all transforms" that should solve the problem

Thank you very much! That fixed my problem.
But now I have a collision problem. I made a collision for my model but i can still walk through some parts of my object for some reason. Any ideas?

What are you using to export, pandemic or mshex?
If using Pandemic try selecting your collision, the go to Model/Modify/Poly. Mesh/triangulate it sometimes helps.
If you are using mshex try not exporting the collision with the rest and let VM create one and see if you have the same problem.

I am using Pandemic to export so I tried your suggestion but it didn't make a difference. Is that all i can do?

I suggest making a new collision model that's as square as possible.

I fixed the collision by using cubes. Thanks for the idea. But i just realized that the object appears higher in-game than it is in ZE. I know that all objects are always a bit off, but this one is worse than the other objects in my level. I even tried freezing the transformations again but it doesn't make a difference. Can anyone help?

where your model is "placed" in the world is controlled by the dummyroot, if you click a on a place in your world, the dummyroot will be placed there, pandemic used this to prevent misplacing of objects that belong together.
if your dummyroot offside from 0.0.0 your object will be placed offside in ZE

The object is placed correctly in ZE, but not in-game. It appears higher than it does in ZE. I placed it on top of another object so it was sitting in the surface of it, but when I play the game it is floating in the air.

Move it down in ZE?

Yeah, I guess I could just move it down, but I'd still like to know of a way to fix it.

Maybe if you post a picture of the model in XSI + explorer someone will be able to see what's wrong. From what you said I have no idea, sorry.