Installing QNX4.25 with 2 CD devices


We are trying to install QNX 4.25 in a Dell Dimension from the Product
Suite CD dated on May 2001.
The PC has a CD-ROM device and a CD-RW device.
The installation detects 2 CD devices and hangs-up.
If we disconnect the CD-RW device we can succesfully install QNX. If we
reconnect the CD-RW device we can use both devices to read CDs.

Is there a method more elegant than the temporal device disconnection
during OS installation?

Thanks in advence.