For Info: RO5 CDFS will read ISO9660 images from DVD, as long as you are using a compatible DVD reader. E.g. Sony or Lite-on (who I believe make the Sony badged drives).
CDFFSoftATAPI expects drives that work predictably. Work I did on CDFSSoftATAPI_CT, as licensed to ROL and shipped in RO4, was more tolerant of misbehaviong CD drives.
I have chosen NOT to import this can of worms into the Iyonix CDFSSoftATAPI since :<li> 1: we ship known good make(s) which work, and <li> 2: it had become a major maintenance burden encouraging CDFSSoftATAPI_CT to continue to support each new drive found.
n.b. There is nothing to stop 3rd parties making further CDFSSoft drivers available. Indeed I would be more than happy to talk to 3rd parties about doing something with CDFSSoftAtapi_CT ...