Mostly the downlaods are just new sounds, sprites, and models.
EVM appears to be, not exactly a MOD by itself, but more of a plugin for ESF, so to speak. It uses the AMX server mod in some unknown way (unknown for now at least) to raise your pl while giving your model special effects similar to the glow function I'm sure you've all seen. It lets you use Kaioken of various types, 1x and 3x confirmed so far, at least I think so, and for a certainty it lets you use Super Saiyan forms 2 and 3, yes that's right, 3! Search these forums for "addon" and find the link in one of the posts that gives you downloads of movies and you'll believe me!
the SSJ3 transformation is sheer WOW!!!!!!
TONS AND TONS OF energy waves, this humongous explosion, then when you are almost done it says for all to see:
(name here) is attempting to transform into a super saiyan 3!
I CAN'T WAIT!!!!! I WANT TO TRY IT!!! AHHHHH!!