Creating Custom Install Media

[Jerahmy Pocott]

Hello,

I'm wanting to make a custom install cd that will load up on the  
serial console,
the documentation says all that is required is the addition of a file  
named boot.config
with the single line "/boot/loader -h" in it.

However it doesn't actually say how to then create a bootable cd image!

I'm assuming the boot strap used is /boot/cdboot, but what other  
settings are used
when creating the bootable cd image?

Also does anyone know how to create one using OSX? It doesn't have  
mkisofs but
hdiutil can create all sorts of images, including iso, however it  
seems to create joilet
extensions differently and the filenames are all uppercase..

Thanks!