Boring Info for the Post!
We usually never had a problem with running 16bit software (software made for like, windows 95 etc..) in a 32bit OS like XP because of backward compatibility. It's not really feasible though, because the processor has to make two passes for every one line of 16bit code, effectively slowing the processing speed down by half its ability.
Now Vista is basically cutting out backward compatibility in that sense, eliminating compatibility with 16bit all together, and providing virtual environments for running legacy programs.
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