I think scrolling is the easiest solution. No new graphics have to be made.
Straightforward resizing is not a good solution because some texts could become unreadable and we have problems with screen width/height ratio (which is obviously different in 800x600 and 800x480). All windows bigger than 800x480 must be redesigned for this resoultion or scrolled.
I wonder why homm 3 fan artists are not interested in making graphics for VCMI… a lot of new creatures are created, there is even “New Interface” project on heroescommunity… and we haven’t even received a promise of doing something (with a few exceptions, but not from people who have done anything else)… simultaneously 14 developers contributed to our codebase. I don’t know how to explain it.