I didn't mean that you should delete something. Put the Dalheim signal box *.SC4Model file into a subfolder of your plugins, start PIM-X, select said folder, and then click on "Models" in the list on the left side. The BAT model should show up in the list on the top right, select it and drag it to the proper category on the left. This will create a new SC4Desc file with all the properties that are necessary for a proper railway station/freight yard.
Then right-click on the list of properties, and select "Create lot" for making a new blank lot. Open this lot in the lot editor and edit it as desired, and finally use SC4Tool to transit-enable it. If you created a nice-looking lot already, you can copy the lot layout manually with the Reader, there's some tutorial around. If you run into some dead-end, feel free to drop me an e-mail (andreas [at] simcityplaza [dot] de) and attach your work there, then I'll have a look.

SC4 relies on a set of properties that determine the type of the lot, but unfortunately, there are several ways to create a lot, and the actual data can be spread across multiple files, which need to be linked properly via a set of unique IDs. Even though it seems to be a good idea to start with an existing lot, the properties that are tied to it might break things, so it's always best to start from scratch, hence I suggested to use this way, instead of editing something that exist.