how do I build a local repository?

[Luke -]

Hi,

I downloaded the f7test1 livecd and it looks great!  I think this has the
potential to really help the spread of Fedora.

On the control panel I could only find an option to select the default
printer, not actually set-up a printer (I'm aware of lpadmin but a GUI would
be nice).

Maybe the response to my questions below will be that I need to spend much
more time reading about how repositories work, but I'll ask anyhow.

On the LiveCDHowTo page the following example command is given:

livecd-creator \
--repo=c6,http://download.fedora.redhat.com/pub/fedora/linux/core/6/i386/os/\
--repo=c6_upd,
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/6/i386/ \
--repo=lcd6,http://people.redhat.com/davidz/livecd/i386/ \
--repo=e6,http://download.fedora.redhat.com/pub/fedora/linux/extras/6/i386/\
--package=fedora-livecd-desktop \
--fslabel=Fedora-6-Zod-LiveCD-1-foo2

If I want to use f7, do I replace "/6/" with "/development/", and
remove the
extras repo (which doesn't appear to exist for development).  Should I also
change "repo=c6" etc. to "repo=c7" or does this not make any
difference?

I notice if I run the modified command above that RPM header files are
downloaded into
"/var/tmp/livecd-creator/build-tmp...../yum-cache/[lcdr_c6|lcdr_e6|lcdr_lcd6]/headers".
Is there a simpler way to build a local repository rather than using these
to download the required RPM's?  I think it'd be good to have the option to
keep downloaded RPM's after a build, and for the next build, only download
any addition ones needed.

Finally, I see that the RPM's do not sit inside the folder given to
livecd-creator "
http://download.fedora.redhat.com/pub/fedora/linux/core/development/i386/...;,
but inside the subfolder "Fedora/RPMS/".  Is this how I should structure my
local repository?  Do I need anything other than RPM's in my local
repository?

many thanks
Luke