Just wanted to let the readers of this forum topic know that:
1. the firmware version 1.24 files and instruction in this thread also apply to the Integra Research RDV-1.1 (in addition to the Onkyo DV-SP1000(E))
Onkyo DV-SP1000 is pretty much identical to the Integra Research RDV-1.1
Onkyo DV-S939 is pretty much identical to the Integra Research RDV-1
2. the firmware update actually improves the reading capabilities of a RDV-1.1 with an older, previous FW version (< 1.24)
3. in order to use the FW files one has to write a CD-R (or CD+R) in ISO9660 mode. This ensures the CD will be recognized as a VCD
4. Once the CD-R has been entered, "update" appears on the display, after waiting a bit longer "stop" will appear. Once "stop" has appeared the update process can be started.