GM10 Super-Explosion file. Where can I get it?

I need the lua file for super_explosion scripted effect (I think it’s scripted, if it’s not, I didn’t know.)
No wonder the game’s been replacing it with big blue spike balls.

If it’s not in Gmod anymore, can somebody tell me how to get refraction/super_explosion effect to work?

That’d be nice.
Also, is it refraction, yay. If it is based off off refraction, then tell me.

[editline]5:45 PM[/editline]
I found it in a SVN repository. here do I place the effect’s init.lua?

I guess you should put it as super_explosion/init.lua ?

DERP.

Where do I place it.