Hi Dap --
LARS, PROTOLARS & Multiple Industries New - I have read the various threads and tutorials that are available ...
Have you read the tutorial in this package (mouse click on the link)?
http://rapidshare.com/files/97388922/PortOgden_1_Documentation.zip
It contains an overview and instructions for configuring LARS, ProtoLARS and MIN.
Will any freight car work with any of these systems? Or do I need a specific type car for each type system?
Any interactive freight car will work with all three systems. An interactive freight car is one that has been configured to load and unload products.
And yes, it can be difficult identifying which ones are interactive. Many on the Download Station have an icon in the thumbnail showing interactivity.
If you are using TRS2004/06, TrainzObjectz will also show which products a freight car has been configured to carry.
There is a section in my tutorial about configuring interactive freight cars.
Will any of the various commodities on the DLS work with any of these systems?
LARS and ProtoLARS interactive industry tracks are configured to load and unload defined products. My "LARS IndustRail", for example, is configured to load or unload over 70 industrial products.
MIN will load and unload
ALL the products installed in your Trainz folder.
Can I use all three of these systems on my layout or should I use only one?
You can use all three.
What are the pros and cons of each system?
MIN can use all products that are available to Trainz. However, it is a bit more complex to set up, and products have to be directly related to particular freight cars. For example, if the MIN is configured to produce 20ft containers, these containers will only be loaded onto the particular type of freight car you nominate when configuring the MIN, for example, the PRR flat car.
LARS and ProtLARS are limited to a defined list of products, but will load and unload any and all freight cars that are configured to carry those products.
LARS is a bit easier to set up than ProtoLARS, but ProtoLARS can be configured to load and unload cars in sequence after a defined delay, and does not need a locomotive attached to the freight cars to function. Some consider ProtoLARS to be more prototypical. My tutorial provides more detail.
What does it take to create a new commodity?
I'll let others respond to this.
Phil
And welcome to the wonderful world of loads: