Delete what you've done t'll now, the game is preinstalled, no need to reinstall it.
Unzip folder ROM1, launch dosbox, go to your ROM1 folder and launch with
sangoku
If that's too hard to understand for you, simply drag/drop
sangoku.com on your dosbox shortcut.
Oh yeah, dosbox is NOT a dos command window in windows but dosbox 0.72.
>A beginner's guide to DosBox<
>wtf IS dos bOX AND DOES IT WORK ON wIN xp?<