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.