Howto make BSD-style init SysV-compatible

To make archlinux boot nicely, some modifications to the init scripts are needed.
First create a /etc/init.d dir and add a new file /etc/init.d/rc with content:

if [ $1 -eq 3 ]; then
echo "entering runlevel 3:multi";
/etc/rc.multi
fi
if [ $1 -eq 6 ]; then
echo "entering runlevel 6:reboot";
/etc/rc.shutdown
fi
if [ $1 -eq 0 ]; then
echo "entering runlevel 0: shutdown";
/etc/rc.shutdown
fi
if [ $1 -eq 4 ]; then
echo "entering runlevel 4"; 
fi
if [ $1 -eq 5 ]; then
echo "entering runlevel 5";
fi
if [ $1 -eq 1 ]; then
echo "entering runlevel 1:single";
/etc/rc.single
fi
if [ $1 -eq 2 ]; then
echo "entering runlevel 2:multi";
/etc/rc.multi
fi

This script starts the right init-scripts for the runlevels. you now should be able to boot up your archlinux guest system. but there is some more work to get around all these warning and error messages on bootup.
You need to remove all that has to do with kernel, driver and networking. Edit the /etc/rc.conf file and remove networking and syslog-ng (syslog-ng will not work) from DAEMONS.
Edit /etc/rc.shutdown and comment out all below and including stat_busy "Saving Random Seed" to # Power off or reboot

Have fun with your archlinux guest and feel free to improve the rc script :)