There are two problems you must resolve to find a solution. #1 you wrote these disks using a "mounting software" like making your RW-CD a sort of "second hard drive". This requires the special software you used to create it. If you take off or erase that software from your comp, then the comp will be unable to read the disk format. your gonna need to reinstall in-cd and then try to get the software to retreive the files. keep screwing with the "in-cd" program until it works.
#2 The Cd-rw you used might be for shit. I read an article that said that ALL writable laser media (DVD's,CD's) etc are lousy for long term storage (1 to 3 years at most!) i once bought the really cheap Cd's without even a top label on them. After 2 weeks they were unreadable!
pure shit. Finds a good brand and try to stick to it, If you want long term storage (100+ years) you need magnetic media like tape, or floppy disks or zip drives.
The fact that your comp reads just a few files that are not what you stored tells me that the info is on there it is just compressed onto a format that only the "in-cd" program can read. maybe you could even pop it into another comp that also has IN-CD installed and see if it can read the disk.
good luck.
ETA: In-cd is NOT nero software, it just comes bundeled with it. it is made by ahead inc. I suggest you download the latest in-cd version and also the reader as well. THEN uninstall the old version then reboot the comp. THEN reinstall the newest version and reader and see what comes of it. Also look all about the net for solutions to this software glitch, using google, someone might already have had that problem.