Maybe the slackware installation is a good point to start:
I think he has to create a boot disk. He can use the following image:
From slackware installation page:
speakup.s This is like the bare.i (standard IDE) disk, but has support for Speakup (and since there was space, support for Adaptec's AIC7xxx SCSI controllers is also included) Speakup provides access to Linux for the visually impaired community. It does this by sending console output to a number of different hardware speech synthesizers. It provides access to Linux by making screen review functions available. For more information about speakup and its drivers check out: http://www.linux-speakup.org.
To use this, you'll need to specify one of the supported synthesizers on the bootdisk's boot prompt:
where 'synth' is one of the supported speech synthesizers: acntpc, acntsa, apolo, audptr, bns, decext, dectlk, dtlk, ltlk, spkout, txprt
I don't know any of the syntesizers, so i can be no help in that point.
After booting with the boot disk he has to create partions (at least one main partition and
a swap partition.) This is done with fdisk.
After partioning the harddisk, the system is installed via 'setup'.