Fury of the Furries

Backup the file FURY.EXE as FURY.BAK and then using
your disk editor (Xtree Gold, PC Tools etc) and do
the following:
                         
FOR INFINITE LVES
Find: FF OE F7 1E
Change to: 90 90 90 90
FOR IMMUNITY
Find: 83 3C FF 74 40 A1
Change to: 83 3C FF EB 40 A1
Find: E9 11 FF C7 06 BF
Change to: E9 11 FF E9 0E FF