Im very inexperienced in QNX. If i create an image on a pcmcia device using rehdat, suse, or even mac. Will I be able to read that image on a QNX machine?

I depends on the file system that you use on the PCMCIA device. Has to be dos based (FAT??). If it’s a raw image, you will be able to read it but not as a file, just as byte on a HD.

QNX understands Linux’s ext2 filesystem too, in addition to the common DOS FAT filesystem. So if your image is using either of them, QNX should be able to read it.