You want to install QNX, but you already have QNX and mount the ISO…?
IMHO the easiest way to install without CD-ROM is to install on another PC, using HD of PC without CD-ROM, then take HD and put it back to machine without CD-ROM. This works, because QNX makes no hardware-specific configurations during installation. All is done on the fly at boot time.
Use VMWare. From there you can boot from t the ISO. Now if you set a partition on the HD to install QNX on, and setup VMware to use the physical HD (and the a virtual HD), you can install QNX on that partition. Once that done you don’t need vmware anymore, or you might really like it and use it everyday