The instructions are ambigous to say the least!
The download unzips into a folder called CFF explorer, no issues there
1st line "You need the explorer ( http://www.ntcore.com/exsuite.php )" So the CFF Explorer.exe in the cff explorer folder is the wrong one?
2nd line "You open with this explorer the XR_3DA.exe in the bin folder from stalker." the what from where?