There are two hidden files in this archive:
1.) The RazoriumHybrid theme for the Enhancer plugin by i_adryan (RazoriumHybrid.bmp)
2.) The RazoriumHybrid for the Winamp Browser homepage (winampmb.txt -- rename htm)
Drag these into the Plugins/Enhancer/[vn]/ and Winamp/ folders respectively.
Everything else goes into the skins/RazoriumHybrid/ directory if you unzip it.

Enjoy the skin,
gargaMONK