I'm running Xen on Fedora 8 and I'm trying to make virtual machines communicate between each others. On CentOS I was able to make network-bridge-custom file and to point out on him from xend-config.sxp file. That file looked like something like this:

#!/bin/sh
#/etc/xen/scripts/network-bridge $1 netdev=eth0 bridge=xenbr0 vifnum=0
/etc/xen/scripts/network-bridge-noifup $1 netdev=eth1 bridge=xenbrBC vifnum=1
/etc/xen/scripts/network-bridge-noifup $1 netdev=eth2 bridge=xenbrBD vifnum=2

After that in ifconfig I was able to see new bridge interfaces xenbrBC and xenbrBD. In virtual machines config files I assigned MAC addresses to those bridges, and communication betweem virtual domains worked perfect!
How to make something like this in Fedora?
I can see, that when I start virtual machine I have more two new interfaces tap0 and vif11.0! They are assigned to virbr0 :

brctl show
bridge name bridge id STP enabled interfaces
br0 8000.000000000000 no
virbr0 8000.c2a429e6b58f no tap0
vif11.0
I'm not sure what exactly to do with these two interfaces? I'm trying to use network-bridge-custom here on Fedora 8 but it seems that it doesn't work.
Does anybody know how to make full connection between virtual machines?

Please, I will appreciate any help!

Time for update. Fedora8 is not supported any more.