How to install on laptop without CDROM?

This might look like a silly question, but i want to install
the free QNX version on my old laptop (Compaq Contura 400,
16MB Ram, 350MB HD, 486 cpu, no CDROM, no Windows on it).

I don’t have an external CDROM, either.

Can i anyhow nfs-mount the CD from my Alpha-Linux box through
a PLIP (Laplink) cable from the floppy started QNX?

Is there a possibility to run a mini linux distribution, make
a partition on the laptop, copy the CD onto it and install from there?
But: i have only limited disk space.

What the heck is the .tar.F format?
Can i untar that with linux’s tar? I assume it’s compressed, but
not with compress, bzip2 nor gzip.
If that would work, i could establish a PPP link to my alpha
box from a mini linux and untar the tarfile directly onto
the partition.

Any helpful hints?

Thanks in advance,

The early bird gets the worm. If you want something else for
breakfast, get up later.