Hi all:
    I'm a newer of livecd-creater.When I am creating live cd,"Failed to find group 'core':No groups available in any repository" error message appears.Following is my steps:
    1.Make a local repository: 
          cp /media/Fedora8/Packages/*  /var/www/html/yum/base/.    
          createreop /var/www/html/yum/base
    2.modified the /usr/share/livecd-tools/livecd-fedora-minimal.ks file, Just changed the repo line to:
           repo  --name=fedora8  --baseurl=file:///var/www/html/yum/base
    3.execute the command:
          livecd-creator  --config=/usr/share/livecd-tools/livecd-fedora-minimal.ks  --fslabel=Fedora8-Minial


........
Retireving file:///var/www/html/yum/base/repodata/repomd.xml...  ok
....
Error creating live CD: Failed to find gourp 'core' : No Groups Available in any repository


Please help me. Thanks in advance!