im new here but id like to just add that i also have KQ5EGA and SQ4EGA. they are *not* VGA games with EGA drivers. they are separate versions. i tried looking at the pictures and views with SCI Decoder but both come out in a mess of pixels stretched out over the screen with a screwed up palette which makes it impossible to tell what they are. SQ4EGA is (unlike the VGA version) decodable tho and you can take pictures and views and sounds etc out of the game. i took Roger from SQ4EGA and put him in SQ1VGA. looked awkward but it worked. but you cant put VGA views/pictures in EGA games. i also took sounds out of SQ4 and patches and replaced a bunch of sounds in SQ1VGA with them. kool experience
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i also have Heart of China around here somewhere and its supposed to be a VGA game (am i right? im not sure) but my version is EGA. then i read in the manual that if a certain version doesnt work or somethn you can mail sierra and they will send you an Disk version with EGA graphics instead. thats about all i can remember.
i seem to be 2 disks short of KQ5EGA but it still works. i havent gotten past the beach with the rowboat tho cuz i lost the dumb copy protection so i dont know how far the game will go before it stops work ncuz i dont have the last 2 disks.
the difference between the EGA and VGA versions is that the VGA versions (well with SQ4 anyway) only have Resource.000 along with Resource.map but the EGA versions are like SQ1VGA/PQ3/KQ5VGA in that they dont have a resource.000 file but have resource.001, resource.002, etc.
anyways there you go...