With the fixed version you do not need the unibios cheats to get the fatalities. However some of the fatalities are changed so heads don't come off etc. Basically the fixed version is not the same as the full fatalities in the MVS version (even if you used a unibios also).
The only way to get the fatalities the same as the MVS version is to use the unfixed AES version (original release) and unibios 2.1 or later.
The shrink cheat should work with either version.
Raz