Ok here's how I did it so far then.
1. Download All Four Parts of Games Separately from the 1st page
2. Then Opened Part 1 and extracted it to a file.
3. Used Daemon Tools to emulate a disc.
4. Downloaded the
OsadaiPatch.rar
5. Put this Patch into the file where the the original game is located.
6. Installed the game and did that successfully b/c I'm able to play it.
7. I start it and It's in Jap.
If you can play it but it is in japanese, my only guess is that you extracted the patch.xp3 to the wrong location and you should try it again. I think that you are supposed to put the patch there after you install as patches are always applied after you install the game.