The reason of no new acela is that in modelling part is very hard to take the shape as rhe real Acela. And tolaris Acela was a conversion of his model from MSTS. I will give a try to make it. I tried to do the Rhinnos, look on the 3dsmax,Gmax thread,(. But as i have said, the front nose and the other parts are way harder than any other standard US passenger rolling stock. And the Acela made by tolaris is still looking good and its very useful. And for the folder, just go to CMP, open for edit the Acela asset's and change the trainz build up to TS12 (you can find the folder opening it in CMP pressing CTRL + SHIFT + E or going to your Trainz root folder and searching on the folder "editing" with the assets openedfor edit in CMP) And then wait to fix errors
greetings