I use os-bs 2.0betaX.  You can find it on ftp.freebsd.com.  It has a
default boot partition with timeout, and can boot any of the 8
partitions on the first two BIOS drives.

With a very slight hack to my bootblocks, I use it to boot NetBSD from a
SCSI drive which is BIOS D:, when BIOS C: is an IDE drive.

==John