That adds global valves, not alterable values. I'm pretty sure there are no extensions that add alterable values (why do you need more than 26 alterable values anyway?). You can use any arrays objects to do the same thing though (I recommend the list object because you need it to automatically move stuff down active objects get deleted).
Keep a valve spreaded through the active objects.
Create a list object for each extra alterable value you want, make sure there are as many lines in each list as there are objects.
Reference the alterable value by taking the line of the list object(s) that's the same as the alterable value of the object.
MMF normally spreads in the same order each time so it works fine, but I was working on a game quite a while ago doing this and it messed up so you might want to keep that in mind. I have an example of this but everything on my website vanished so you can't see it.