I have same problem.
if you can't open the game
check "reg.ini" open
and make sure the word is not garbled
#REGNAME = "裸足少女\\ゲーム恋"
and then you can open the game
but it will require you insert DVD
You have to run "gamekoi1.mdf" when you run the game first time.
AND YOU CAN OPEN THE...