Is there any way to add BrawlEx to a Project M build?

I found a Project M build with BrawlEx already installed, but I want to be able to add BrawlEx to a build that I already made.

I added some stage alts to my Project M build, and one of them is selected by holding right on the d-pad. The problem is, when I hold right on the d-pad, it moves the cursor to the right.

Does anyone know how to stop the d-pad from moving the cursor? I know it's possible, because Legacy XP did it.

Thanks in advance.

I want to be able to change the way a move moves a character, and I just don't know where to start. For example, I want Ganondorf's aerial Side-B to move him at a upward angle (similar to Wolf's Side-B).

Do I have to edit the fitmotion.pac file to do this? And can I do this with PSA, or do I have to use BrawlBox (I ask because I don't have much experience with BrawlBox)?

I don't have much experience with things like this, so if anyone can give me some tips on where to start, that would be great.

Thanks in advance