How to boot with gpt disks

[Nat Sloss <nathanialsloss%yahoo.com.au@localhost>]

Hi,

I've setup a harddrive with a gpt containing ffs partitions and swap.

I've unpacked sets on one of the ffs partitions.  Copied boot from a directory 
on the partition to the root of that partition, installed a bootloader onto 
the corresponding wedge.

I then used gpt biosboot -i 1 sd0.

And no output and when attempting to boot with that disk upon startup I 
receive an error:  Error:  No slice

This was using 5.99.58 i386.

The same steps were performed on 5.99.51 and gpt biosboot produced output and 
the machine boots.

Has something changed? Am I missing something?

Any help appreciated.

Regards,

Nat.