I've never had any luck using CloneCD

. Hopefully some of you know what I'm doing wrong.
I have images of three CDs in a single .zip . There are three sets of IMAGE.sub, IMAGE.CCD, and IMAGE.img. I think that each set is for a diff CD, so I prolly have to extract the three set into three diff folders

. So anyways, I did that, now I'm trying to burn them using CloneCD. I click on "Write From ImageFile", select the IMAGE.ccd from one of the folders, selected "Game CD", finaly clicking ok. But then I get "IMAGE.sub does not match to IMAGE.img" error. I tryed to figure out which combination of the .CCD, .sub, and the .img worked, but couldn't. There's a total of 27 permutatitions, correct me if I'm wrong. I could try them all but the thing is I'm not suppose to raname the files, so I wont know which ones I've tryed placing in one folder together. I've read somewhere that I shouldnt rename the files, otherwise I could have placed them all in one folder.
The question is: Is there a way of determining how the image files should be grouped?
This is exactly how they appear in the .zip folder, and this is how they files are named (all have diff sizes):
IMAGE.CCD
IMAGE.CCD
IMAGE.CCD
IMAGE.img
IMAGE.img
IMAGE.img
IMAGE.sub
IMAGE.sub
IMAGE.sub
I'd greatly appreciate any help