I cant get HOMM 4 to work

[Crysta]

Ok I got the install disk to FINALLY work. Now I cant get the other disk to work. (It works fine on a rw but not on a writable disk. )I did use a RW to get the first copy and Ive wasted 4 disks trying to copy the final disk to a writable. Could the disk be bad??? We got like 50 of them for $15.00. That was cool. If anyone needs help with homm4 feel free to e-mail me or the like with questions. I would like a reply if at all possible.