[Brainn]

try this one:
copy all the Cainyx textures to RDX_mediapack\buttons\Cainyx\
then use this script to register it as a buttonskin

VFLUI.RegisterButtonSkin({
    name = "bs_cainyx";
    title = VFLI.i18n("Cainyx");
    dd_disabled = "OVERLAY";
    highlight = {
      blendMode = "BLEND";
      path = "Interface\\AddOns\\RDX_mediapack\\buttons\\Cainyx\\Highlight";
    };
    border = {
      blendMode = "BLEND";
      path = "Interface\\AddOns\\RDX_mediapack\\buttons\\Cainyx\\Border";
    };
    flash = {
      blendMode = "BLEND";
      path = "Interface\\AddOns\\RDX_mediapack\\buttons\\Cainyx\\Overlay";
    };
    dd_border = "OVERLAY";
    dd_autocastable = "OVERLAY";
    normal = {
      blendMode = "BLEND";
      path = "Interface\\AddOns\\RDX_mediapack\\buttons\\Cainyx\\Normal";
    };
    pushed = {
      blendMode = "BLEND";
      path = "Interface\\AddOns\\RDX_mediapack\\buttons\\Cainyx\\Overlay";
    };
    gloss = {
      blendMode = "BLEND";
      path = nil;
    };
    dd_flash = "OVERLAY";
    backdrop = {
      blendMode = "BLEND";
      path = "Interface\\AddOns\\RDX_mediapack\\buttons\\Cainyx\\Backdrop";
    };
    dd_normal = "BORDER";
    dd_highlight = "HIGHLIGHT";
    dd_pushed = "ARTWORK";
    dd_gloss = "OVERLAY";
    checked = {
      blendMode = "BLEND";
      path = "Interface\\AddOns\\RDX_mediapack\\buttons\\Cainyx\\Overlay";
    };
    dd_backdrop = "BACKGROUND";
    dd_checked = "ARTWORK";
    disabled = {
      blendMode = "BLEND";
      path = "Interface\\AddOns\\RDX_mediapack\\buttons\\Cainyx\\Arrow";
    };
    autocastable = {
      blendMode = "BLEND";
      path = "Interface\\AddOns\\RDX_mediapack\\buttons\\Cainyx\\Overlay";
    };
});

set the buttonskin size offset to 5

from a quick first look this seems to be like it is shown on the screenshots over at the cainyx download page