|I found references to a program called NewDeal.|
Here is the website:
The only problem is, it's in german.
Sprechen Sie irgendwie Deutsches gut?
However, why would you EVER want to use a Hercules CGA card? I recently got five pounds of 1993 VGA cards for free! They were being thrown out. I don't know too much about the Hercules computers, but I think the BIOS would take a newer card. Look for ISA Video cards. They will probably sell for few dollars or so.
Here are some Ebay sales
Some people are like slinkies, useless but still fun to shove down the stairs.