To install Linux on a SPARC based computer, should be strightforward if you follow the informations provided by your distribution.
To boot from a floppy drive you have to have an install image on a floppy disk and to issue the
boot floppy
from the OpenBoot.
If your computer does not have a CDROM or a floppy drive, you can always try to perform a network installation using
NFS
as explained by this French document: http://www.linux-france.org/article/materiel/sparc-install/Sparc-netinstall.html
. Basicaly, you have to set up an
NFS
server and to boot your computer using the
boot net vmlinux nfsroot=192.168.52.12:/tmp
in order to access the image that is exported by the
192.168.52.12
computer on the
/tmp
directory.