I got hold of both programs cdmage and winiso, and this is what i have found out. Cdmage (freeware!!) is a very good program but you can't add any files or folders into the image that you have. It only checks it for errors and repaires them. It did find the read errors on the image of the game and I was able to remove them(which is something of no importance,since the game would still work).
Now winiso does support adding files and folders to an already made image. Now what is the problem? The problem is that it cannot save the changes to the same type of image that you had, only on iso format. It has an option save which, bad for me, I pressed it and my clone cd image didn't work anymore because clone said that the sub file didn't match with the img file!!! When I tried to convert the clone image to iso (yes i did it again, the image) it didn't make it because of the read errors I quess. So what you must do is, maybe the following: remove the read errors with cdmage, add the files or folders with iso, and convert it to iso(that the only thing you can do anyway, with winiso). I didn't do this yet though, because my winiso program wasn't working 100% (I have to test it before I buy it
if you know what i mean ). OUFF that's all for now. If you have another idea PLEASE write it.(perhaps another program? )