CD41.iso exact use, requirements, etc.

Hello,
	I apologize in advance for the fact that this is a very
newbish  
question.
	I just started thinking about putting OpenBSD on my G4
(Flat Panel)  
iMac.
(It's my main machine and has lots of important data on it,
if you  
must know why).
I've installed it on various i386 machines before, and been
very happy.
	I downloaded all the files for the ppc install, and was
surprised to  
find an iso was included.
However, the INSTALL file isn't entirely clear (to me,
although I'm  
likely missing something)
on what it does.  It says,
			A miniroot filesystem image suitable to be used
			as a bootable CD-ROM image; otherwise similar to
			the bsd.rd image above.
So my question is this:  What is the exact purpose of the CD
I would  
make from this?
Is it somewhat like a linux livecd, in that I boot it up and
it runs  
OpenBSD
(if yes - is it command line only, or does it include X,
etc..)?
Do I need anything besides the CD to run it?  Is there any
danger to  
my files?

Thanks,
Steve

Thank you very much.

Steve

On 12 Oct, 2007, at 2:51 AM, James Hartley wrote:

> On 10/11/07, Steven Presser <steve160gmail.com> wrote:
>> So my question is this:  What is the exact purpose
of the CD I would
>> make from this?
>
> As Matthieu points out, cd41.iso simply boots the
kernel & starts the
> install binary.  No file sets are contained on the CD
such that at the
> point where it asks for the location of the file sets,
switch CD's to
> the one containing the file sets & proceed.
>
> Why this method of separating the file sets from the
installation
> program itself?  If you were to later decide that you
wanted to
> install a snapshot of -current which also consists of
(newer) file
> sets, you wouldn't have to burn another copy of the
installation
> binary.  You can save one CD-R disc by reusing the
cd41.iso image
> already burned.  Conceivably, you could burn the file
sets for 4.2 or
> -current & install them through the cd41.iso disc
already burned, but
> I wouldn't recommend getting too much distance between
the versions of
> install binary & the file sets.
>
> This is all the cdXX.iso images do.  No live CD
functionality other
> than to boot the kernel & start the install.