slices to "dangerously dedicated"

[Wojciech Puchar]

using live CD/DVD make your new disklabel that mirrors existing but is in 
/dev/disk not /dev/diskslice, check it (try mount -r your partitions from 
/dev/disk[a-h]), clean MBR with fdisk, install bootrecord with

bsdlabel -B /dev/disk

then mount your / partition and fix etc/fstab

it's not just about having few kB more space, but NOT having MS-partition 
table. for "religious" reason, for making thing simpler or less risky if 
you sometimes connect that drive to computer running windoze.