I'm mostly confused by the line "Drop HD gained by class levels (minimum of 1) and change racial HD to d8s."
Now, let me see if I understood that correctly;
If I'm dealing with something that has no class levels, like an Owlbear, which has hp: (5d10+20), it would now be a zombie with hp: (7d8+20). Not sure if that 20 goes there or not though.
How would I deal with a character that has 1 or more class HDs? For the skeleton template it just says to drop them all and use only the racial HD, make them d8s, and if it has none to just do 1d8, which is pretty clear.
I'm confused by the "(minimum of 1)" part though.