Hmm... Well, scrounging around the web a bit, I found an explaination for EasyCD Creator and ISO images.... It's pretty similiar to the Nero one...
The trick is that you don't want to burn the file in the default data mode (drag and drop), but you want to open it as an ISO. Once you open the ISO, it should drop you right into a settings menu with the burn option. You won't be able to see what files are on the CD until it's made. Even after it's made, it may appear to be a bad CD to Windows... (Just like expanding a DMS can give you a disk that shows as DF0:BAD, but properly works when booted) It's just the nature of that.
There are utilities for expanding ISO images, but you probably don't want to do that.... You'd most likely end up with a CD you could see the contents of on the PC, but still couldn't use on the Amiga.
Ok... Anyhow, onward. I found these instructions for EasyCD on-line...
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After opening the Easy CD Creator program, select ‘Record CD from CD Image’ from the file menu at the top left.
Browse to the folder that you saved the ISO image in.
Change the file type to .iso through utilizing the drop down arrow in the "Files of type:" command at the bottom of the screen. The file type will switch from *.cif to *iso during this process. Once you have done this, your ISO file will show up in the folder. Highlight it and select the "‘Open" button.
The CD writing dialog box will automatically open. Select the burning options that are best for your system. Insert a blank CD-R into your burner, if you have not already done so. Select the "Start Recording" button to continue.
The process may take several minutes, depending on the size of the ISO image as well as your CD burner’s ability. Once the disc is finished burning, select the "OK" button to complete the process.
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Personally, I've had much better luck with Nero than I have with Easy CD creator, though. (In fact, I no longer have EasyCD installed on my Windows machine...) If possible, you might want to pick yourself up a copy of the Nero. I think 5.5 or so is the newer version, and I'm not sure about pricing out there, but I got mine brand-new for approx $5 at the local swap. Well worth the reduction in headaches!