Free item with purchase.

Couldn't find anything in the forum on this.

If I wanted to give a way a free product with a purchase over a certain amount, how would I get that to load into the shopping cart during checkout?

There is no option for that.
Why not just edit the file "step" of the view "checkout" via the menu Display>Views and add a message saying that the free product will be included to the order if it is over that certain amount ?
That's quite simple to do.
Otherwise, really adding a product to the order in such cases would require a code customization in that same file.