OK, after another few attempts I managed to do it.
I downloaded the forge zip, unzipped it and added the ".jar" file to the "coremods" folder of the "attack of the b-team" folder.
It works. Let's hope it doesn't interfere with other mods in the future, when I explore all the mods, as I play further down the road.
It's a lot more efficient with a sprint button bwt, you press and hold it once, and you can run around.
With the double tap, every time you hit a solid block you have to double tap again. (so annoying)
Thanks for the support every one!