Baffled with Chimaera Acid Missile

I'm trying to make it into a lava ball instead, but No matter what I do with the color fields in the model, that green shell thing on the model is always green! I could also use some help with tinkering with the colors on it so I can get it to be a nice reddish-orange lava color, I just don't have enough patience to edit, save, open editor, repeat all day. If someone can make a chimaera acid missile look like a lava ball, I'd love to use it, and I'll give you credit, and some inside info on my campaign.

But what is/are the blp files that need to be edited for that?

It uses an mdx file I think.