instalation raspbian and/or easyIot image

Dear all,
First of all I am very new here and have no experience with a raspberry pi.
So I hope you will not get to irritated when I ask stupid questions.
I use a raspberry pi B+, with 8 GB sd card is this ok?
I follow the guide how to install EasyIoT server to Raspberry Pi.
On My SD card is a fresh raspbian image, everything look ok so far, but what do i have to do now, according the instuctables.com ESP8266 WiFi relay switch instructions, I have to download the latest version of EasyIoT server image and write it to the SD card, but how can I do that because the sd card has already the Raspbian image.
Please can somebody help me in this matter?
With kind regards

Remove sd card from your Pi. Format it by using your pc. Write EansyIoT image to sd card ( www.raspberrypi.org/documentation/instal...n/installing-images/ ) and you are clear to go.

Thank you Harrydutch,
according easyIot installation guide, my SD card need a Raspbarian image on it,
This is what I did, as you stated that I need to format the SD card before I put a EasyIoT server on it I will loose the Raspbarian image, so I do not really understand, I hope you will help me out I really like this project.
With kind regards,
Koen Haarlem , Holland

Hello, There is a complete image for download, it includes everything to get EasyIoT up and running. You dont need to follow the guide showing you how to add it to rasbian. As the image has everything.

iot-playground.com/download

At the bottom you will see:
EasyIoT server Raspberry Pi disc image file (Raspberry pi)

Raspberry Pi image username: pi password: raspberry

EasyIoT Server v0.7

Windows users can write EasyIoT server image to SD card with Win32 Disk Imager. Disk image is already configured to automatically start EasyIoT server as service.