STEP 1: On your SME 5.6 probe your webcam :

modprobe videodev
Depends on your webcam install type one of the following
modprobe stv680 or modprobe cpia(See this list) or modprobe ov511 (See this list)

STEP 2: Install vidcat RPM
Available here
Make test to be sure, every thing working fine
Other format type(jpg,png) are not working

STEP 3: Install Motion 2.6.3 (Source : http://motion.sourceforge.net)
Availabe here
Motion take photo when it detect some movement in front of your webcam.
After installing RPM, config example are in /usr/local/etc/
You need to launch motion from the directory where the config file are.

STEP 4:  Install mpeg_encode
Available here
Motion can make mpg file of all pictures take, mpg_encode is needed.
Uncomment line #mpeg_encode yes in the config file

STEP 5:  Making template of config file
Create new directory for the template
Copy the example of the config file

STEP 6:  Create startup script
Create a shell script in your startup directory
Include the following line :

#!/bin/sh
# Description : Starts and stops an video survey
#/etc/rc.d/init.d/motion

MOTION_CONFIG_FILE=/etc/motion.conf

. /etc/rc.d/init.d/functions

case "$1" in
start)
KIND="MOTION"
echo -n $"Starting $KIND services: "
modprobe videodev
sleep 5
modprobe stv680
sleep 2
daemon /usr/local/bin/motion -f $MOTION_CONFIG_FILE -D
echo
;;
stop)
KIND="MOTION"
echo -n $"Shutting down $KIND services: "
killproc /usr/local/bin/motion
sleep 4
rmmod stv680
sleep 2
rmmod videodev
echo
;;
status)
status /usr/local/bin/motion
;;
*) echo "Usage: $0 { start,stop,status}"
exit 1
esac
exit 0

Adapte line modprobe stv680 and rmmod stv680 with the parametre for your webcam

STEP 7:  See result
Motion create many subdirectory beginning with ./[year]/[month]/[day]
Movie are placed in that directory.
Some more directory may exist, it contains pictures.