I think I would use Everything from voidtools. You'll know what folder structure your tracks are in so you can find them. Then sort them by Date Modified (ie the order you downloaded them) and drag them into WMP. Once in there save it and it remembers the order - after that who cares? So here are a load of tracks all called the same but all different. Just reordered them three times. I just selected a load of tracks with the same name but the principle applies I think.

In your case it would be easier as you'll know exactly which folder/folders they are in. I just an extreme example from all over the place

Quick video example