• Create a file in /etc/sysconfig/modules and call it with the extension .modules
• Make it executable

Example 1:

/etc/sysconfig/modules/ipmi.modules

#!/bin/sh

if [ ! -c /dev/ipmi0 ] ; then
  exec /sbin/modprobe ipmi_si >/dev/null 2>&1
fi

Example 2:

/etc/sysconfig/modules/scsi.modules

#!/bin/sh

if [ ! -c /dev/sg0 ] ; then
  exec /sbin/modprobe sg >/dev/null 2>&1
fi