How can I read differential output from accelerometer with arduino

Hello, I am currently working for my research study and I have some difficulties in reading differential output from accelerometer Model 3741B122G (http://www.pcb.com/Products.aspx?m=3741B122G) with arduino Mega2560. My questions are as follow;

  1. Differential output
    According to some websites, I should connect each output to analog input pin and calculate the difference. But, signal I got is floating. Is it related to No.2? I think there should be something I still don’t understand or miss.

  2. Output range
    The accelerometer has output range -2 to +2 g, sensitivity 1000mV/g. So, voltage output should be around -2 to +2 V. While arduino analog pin can read only 0 - 5V, I have to convert the sensor output into 0-5V range with summing op-amp and Voffset first, right?

Your suggestion will be really appreciated as I am a beginner for both electronics and Arduino. I am maybe looking in the wrong direction so any suggested source for further study is also welcome. Thank you.

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I've already got the solution. Sorry!

Can you post it so people can learn it in the future?

Thank you