The tutorial.zip file you have requested: Shadow of Chernobyl / Utilities / Modding Tutorial - 1.24mb is not available. Perhaps try browsing all files for the game S.T.A.L.K.E.R. Shadow of Chernobyl and upload any files you want to share or are missing. This is the only information we could locate:
This tutorial shows mod beginners how to make a little mod. It included a dds-plugin for Adobe Photoshop and for GIMP 2.0. You can download this if you don't now much about moding in S.T.A.L.K.E.R.