Installing Raspbian with patches contained onto a SD card:

download:
http://files.busware.de/RPi/raspbian-fhem.zip

un-zip:
unzip raspbian-fhem.zip

copy to a (min 4GB) SD card:
dd if=XXXX-raspbian-fhem.img of=/dev/sd<your sd card>

Windows users may use: http://sourceforge.net/projects/win32diskimager/

boot the card @ RPi

Notes:
- *** DO NOT insert a battery *** RTC by default uses on-board super cap and does charge it! 
- FHEM 5.3 will be availabe at: http://<RPi-IP>:8083/fhem
- rev1/rev2 boards are supported to automatically swap their I2C ids - bus 0 will always be ours!

Test for COC existence:

root@raspberrypi:~# hexdump -C /sys/bus/i2c/devices/0-0050/eeprom 
00000000  43 4f 43 20 56 31 2e 31  20 46 55 4c 4c 20 32 30  |COC V1.1 FULL 20|
00000010  31 32 2d 30 39 2d 31 37  00 ff ff ff ff ff ff ff  |12-09-17........|
00000020  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|