When you install the Xatrix addon texture pack it will overwrite some of the existing  texture files.
Some of the files that are overwritten look different so what I have done is split the Xatrix texture pack up into two zip files:
XatrixTEXTURESfix.zip 		-> All the new textures without overwriting any files.
XatrixTEXTURESoverwrite.zip	-> All the new textures files that overwrite existing textures files already in Kingpin.

FREDZ