Just posting my installation notes here in case someone finds them useful:
Installation media setup:
Setup FTP yum -y install vsftpd service vsftpd start
Loopback mount the installation DVD to /var/ftp/pub mount -o loop /export/C-5-i386-DVD.iso /var/ftp/pub
Create a VBD for the installation
lvcreate -L 3G -n xm-fc5-001_lv rootvg
Run the installation
xenguest-install.py -n xm-fc5-001 \ -f /dev/rootvg/xm-fc5-001_lv \ -r 256 -l ftp://192.168.0.10/pub/
Caveats:
Installer doesn't check if enough memory is available. Drop to run level 3 and/or mem-set other existing dom0s to lower memory (or shut them off).
Installation path is to the root of the DVD, not the Yum repository package path.
Copying an LVM (easy way to duplicate VBD)
1) Start with an installed DHCP enabled domU. 2) lvcreate -L 2G -n copyof_xm rootvg 3) cd /dev/mapper; dd if=rootvg-xm of=rootvg-copyof--xm bs=1M 4) cp /etc/xen/xm /etx/xen/copyof_xm 5) edit /etc/xen/copyof_xm; change the MAC, name 6) xm create copyof_xm