The fact that the software and hardware is evidently still in use at some companies gives me pause about whether releasing it in a cracked form publicly after having published it on a personal website would be a good idea.

Software companies love to milk enterprises for all their worth, because they're the entities who will pay the most amount of money if it means that the software they use can still work - and a big part of how they do this is via vendor lock-in. We can see in this article that this company was still using Windows 98 - they're clearly locked-in!

All of which is to say that this intellectual property might actually still be owned by a company who'll be able to sue.

If you haven't already checked whether the patent and other intellectual property is still owned by any company, OP, I would strongly suggest doing so first.