How do I create a bootable macppc cdrom ?

["Fabricio Bortoluzzi" <fabricio@inf.univali.br>]

Hi,

How should I procced in order to make a bootable macppc cdrom?
I´ve been following the instructions on
http://www.shockley.net/obsd-bootcd.asp but I get this error:

mkisofs: Uh oh, I cant find the boot image
'/home/fabricio/OpenBSD/3.1/macppc/cd31.fs' !
(using mkisofs on FreeBSD 4.6-STABLE and, of course cd31.fs *is* there)

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I´ve been trying other ways too, like to put all files on a CD and no
boot sector.
This way ofwboot is found but /3.1/macppc/bsd.rd is not.

Regards,
Fabricio Bortoluzzi.