How do I reskin common infected?

[CoppeR]

I've been looking into modding and reskining some l4d2 things. I'm confused and need some help. I have vtcedit, paint, and gcfscape; at least, that's what one guide said to do. Another guide said to use l4d2 authoring tools.

If you could help me, that would be great. I've been wanting to add higher textures to the commons and give them different color variations.

[Zetnus]

First, I suggest you try reskinning something else like a special infected or a survivor or a weapon. There are plenty of guides for that kind of stuff. For example:
https://steamcommunity.com/sharedfiles/filedetails/?id=132557824


The common infected are much harder to work with. Once you know how to successfully reskin something that isn't a common infected (and only then), I suggest you read this presentation and it will help you understand how the common infected textures work: http://www.valvesoftware.com/publications/2010/GDC10_ShaderTechniquesL4D2.pdf