The file is, as one might expect, binary. /var/adm/messages has a bunch of errors complaining about the module not fitting into memory. If anyone thinks it will be helpful, I'll post those messages here.
I was unable to add the driver. The last time I tried, it hosed by /etc/name_to_major and /etc/driver_classes files, which makes booting a bit difficult. ;) This message posted from opensolaris.org