Pull the hard drive, stick it in a computer running WinMFS, see what mfsinfo has to say, if it reports that the drive boots from partitions 2, 3, and 4, use fixboot option 2, if it says it boots from 5, 6, and 7, use fixboot option 1.
That'll make it change which set of partitions from which it boots.
If it doesn't help, you can always change it back.