dont know if you ever got it to work, anybody that still has low fps, D3D9.dll file mentioned on this thread no longer works, to get the game to work....
1.
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go here and download "dgVoodoo v2.62.1", if theres a newer version it should still work
2. open and navigate to ms/x86
3. drag and drop the D3D9.dll file to the games main directory
if its working you should see a watermark in the lower right corner of your screen
also the game does not support multiple monitors, it wont start unless disable the other monitors, in windows 10 you can use *windows key* plus P