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:
. 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
Another source of information, this one is written in English,
is this FAQ from the UltraLinux website (