This is just a post to help others who might run into the same problem I had. I have old DOS formatted files of infocom games (Suspended and Starcross, my two all-time favorites). I couldn't get gargoyle to recognize these on the iLiad or on the PC (running XP). You want the content of the .DAT file in the DATA directory, but gargoyle won't recognize that extension. (The games do run on the Windows box if you double-click the .BAT file.) After a lot of digging around, I found a reference to changing the extension of .DAT files to the appropriate version of the Z interpreter. To find the appropriate version of the Z interpreter for your game, check the list at
http://www.csd.uwo.ca/Infocom/games.html. For example, all releases of Suspended were version 3 of the Z interpreter. I renamed the extension to .z3 and gargoyle recognized the file correctly, at least on the pc. (On the iLiad, unzip turned the zip file I had into a .img file, not what I wanted. More experimentation is still needed to get Suspended working on the iLiad.
)