When dealing with WHDLoad forget about ADF's or dms files... Each install is different, some retain the whole floppy images whilst others will utilise directories and files for the game data (dependent on the game).
As for the anti-piracy code booklets or code wheels etc, AFAIK all WHDLoad game installs have been programmed by their respective authors to remove such protection (to save us typing crap in and mucking around with code wheels).
http://whdownload.com/The above site DOES contain the game/demo in its entirety. I have no idea why you keep saying it doesn't!
If you're running an A1200, you'll need 2mb fast ram or more in the trapdoor. I recommend 4mb minimum though. What would be nice is 8mb fast ram and a faster cpu, such as...well, any really...