Solid object... not solid?
I am creating an incinerator and the problem is that the incinerator model is not solid in the game. I can not touch, walk on, or physically interact with it at all. Any help would be appreciated, thanks.
The incinerator model doesn't have a collision model. You have to create func_detail brushes with the tools/toolsinvisible texture on them, and place them where you want the incinerator to be solid. Or you can download my prefabs. 
Commercialism FTMFW!!!!
nah seriously though. thanks for the prefabs 
Is it possible to build a collision model out of the original incinerator model itself? If so, how would I go about doing this?
You'd have to decompile the model and then load it into your favorite modeling program. You might be able to just use the actual model as the collision model but that is a TERRIBLE FUCKING IDEA since collision models should be farily simplistic.
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Well, I'm new at this, I'm still learning. 
How can I get the collision entities of the doors(prop_dynamic in this case?)to animate with the opening and closing of the doors?
Thanks.
Are you still talking about the incinerator? Add an OnAnimation output for the model and trigger a func_brush via the input Disable. Or make some other entity trigger the func_brush.