Is there a dll file for making automatic steel supports. Kind of like wood magic, but for steel. If so, can you please direct me there?

No. The closest thing to that is using pre-fab supports, but you want to stay away from them if at all possible.

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Yeah, everyone hates you for using them. I know it take a long time to make them, but it is well worth it in the end.

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^EL TORO^ RULES!!!

The only coaster program that i know besides RCT is Scream Machines which you can get automatic steel supports on that. Scream Machines is sub-par compared to No Limits but still the track options are unlimited. You can get a free download of Scream Machines to check it out though.

It does take a long time to make them! I still need to get used to it. Oh, well. thanks, all.

You can make them more realistic by using auto flanger.

That's the only help though. You have to make the supports first, and then use the flanger.

Wait, what auto flanger? If you mean place tubes, that's easy. The hard part is getting the nodes done properly.

The node placement can be tricky sometimes as the free nodes often don't line up with the track node. If you want an easy way to move them around, you can use the arrow keys and the pageup/pagedown keys to move them by one unit.
When looking from top view:
up arrow: moves one click towards the top of the screen
down arrow: moves one click towards the bottom of the screen
left arrow: moves it to the left
right arrow: moves it to the right
pageup: moves one click up vertically(you won't see a change in top view)
pagedown: moves one click down vertically
I found these shortcuts very useful while spending the 3 days of creating the supports for tomahawk.

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^EL TORO^ RULES!!!

That helps a lot. Thanks!