Hi Jude, I was never able to install Gentoo with braille or speech output without the help of another Linux distro. That said; I booteed a Debian installer where I did have braille support or installed a minimal Debian system and from this point I installed Gentoo into a mounted empty partition. This required many manual steps and later the old minimal Debian has to be removed and so on, so this is really no task for a beginner.
Having at least braille support in the Gentoo installer would be really nice. Ciao, Schoepp
