Hi MES Drvr,
Hellenic Imperial is a Greek(Hellenic) company so the Middle East subforum isn't the appropriate place to ask for infos. Members with information for the company would probably don't check out the middle eastern subforum.
The company had 747-200 as you mentioned. A plan to replace them with A340 terminated even though an aircraft was painted in Hellenic colors, probably due to lack of funds. As for the current situation if the company still exists yes it is Jumbo operator. By the way the building in Athens that houses the company's office still has Hellenic Imperial signs. I can't tell you if the sign is leftover or not.