@ Countzero,
Yes, you are exactly right, I was thinking of the combat portion of UFO in a "Gold Box" AD&D style. I think it could be done fairly easily and well if the source for each was available and a small group of enthusiastic player/programmers/artists could be found to work on it. It would definitely be just for fun (hopefully) as I don't think it would make any money if offered for sale. I have one great artist that might be interested in doing the full screen stuff and some of the characters, she is very young and does not have a full time job yet. Almost anyone could do the small graphics for scenery blocks, weapons and other items. If I could find the sources and a few programmers to help me, I think it would be possible. In fact on the PC there was a last installment of the Gold Box style called Forgotten Realms Unlimited Adventures, which was an editor/game creator that was very popular. Check the Web for FRUA and you will still see many sites listed. Many of those sites probably have most of the graphics needed that could be used or converted for use, which would save a lot of time and effort.
By the way, your English seems perfect to me, playing those games must have worked! :-D