1) download latest posbox image from: http://nightly.openerp.com/trunk/posbox/

2) gunzip the downloaded image on windows (ex: gunzip -d posbox_image_v14.zip)

3) rename the image, to have .img as extension, ex: posbox_image_v14.img

4) format the SD card using diskpart

5) use Win32DiskImager to write the img to an 8 GB SD card

6) ensure the EPSON is powered on, and connected to the RPI

7) insert the SD card in the RPI and power on the RPI