This tool was made for HD-owners, who want to run games from
ther harddrives.
You know the problem, you load the game, it starts, and tries to
load it's data from df0: !!!
there are 2 ways to solve this problem.
1: patch the program.
2: use this tool.
First time you run df0todf4 it will convert df0: to df4:.
Now you can assign df0: to you'r game directory on you'r HardDrive,
and you'r problem is solved.
When you are finished playing, type "assign df0: remove", run df0todf4, 
and it will make you'r internal drive to df0: again.
enjoy.