[crispy]

Might be worth doing the following to see if it's a reading or writing error.

1. Download and install Daemon Tools (follow link above or google search)
2. Once installed, mount your HD images of these cds woth Daemon tools.
3. Attempt to run them from the mounted images.

Let us know the result. i.e. images not running then probs with reading the originals; images running fine, then probs are writing related.

Then we can get somewhere