[Udpcast] config file from pxe

Hi, I was wondering if could be possible to add a cmdline option in /tftpboot/udpcast/pxeslinux.cfg/default to pass configuration file options, like auto=yes lang=US kbmap=US netmodule=pcnet32 netmodparm= dhcp=yes port=9000 disk=/dev/hda mode=0 udpcparam= Something like label linux kernel linux append load_ramdisk=1 initrd=initrd root=/dev/ram0 conf=auto:yes:lang:US:kbdmap:US ... and so on ipappend 1 I would like to add ca_ES lang suport, also spanish keyboard map, how can i do it ? Thanks in advance