One additional note about installing Solaris 8 that some customers are having luck with is after they get the latest DCA disk (currently 6/00) from solaris:
http://soldc.sun.com/support/drivers/dca_diskettes/
they do the following:
open a:\solaris\bootenv.rc and add " setprop acpi-user-options '0x2' " to the end of the file. Here is a sample of that file with the additional line at the very bottom.

#ident "@(#)bootenv.rc 1.17 99/12/06 SMI"
#
#       bootenv.rc -- boot "environment variables"
#
setprop boottimeout 0
setprop confflags "-f"
setprop bshfirst false
setprop output-device screen
setprop input-device keyboard
setprop boot-file kernel/unix
setprop kbd-type US-English
setprop target-driver-for-scsi sd
setprop target-driver-for-direct cmdk
setprop target-driver-for-csa cmdk
setprop target-driver-for-dsa cmdk
setprop target-driver-for-smartii cmdk
setprop pciide true
setprop net-config-strategy rarp
setprop prealloc-chunk-size 0x2000
setprop ata-dma-enabled 0
setprop kbd-wkeys true
setprop acpi-user-options '0x2'

I have had several customers feedback on this with positive results. Especially on the ML370.