Cover art illustrator name for Drakkhen?

I try to find the name of the illustrator responsible of the USA cover art of:
* Drakkhen (http://www.mobygames.com/game/drakkh...CoverId,21782/)
* Chamber of the Sci-Mutant Priestess (CSMP) (http://www.mobygames.com/game/chambe...CoverId,91053/)

When you look with a huge zoom level at the manual cover of Drakkhen and at the CSMP cover, it seems that there is a "Huston" signature (Heston? Hoston?) always at the bottom right corner.
After some googling, the best match could be perhaps "Steve Huston", also credited for the "Super Pro ..." games on Intellivision (same style? same timeframe, same location (usa)).

Question: Is anybody here able to confirm that? If yes, is he credited for other games?

(Note: illustrator of european covers is Caza)

Thanks!