I did a lot of searches on Google in how to install Intous 4 driver, but I couldn't find anything that worked until now.
I am looking for step by step installation tutorial to install the driver.
and how can i check that everything is configured correctly?
Please install the latest driver (both kernel and xorg parts) shown in this help file:
https://help.ubuntu.com/community/Wacom/LatestDriver
For example:
This should install the latest driver for both maverick and lucid. If this doesn't work then let me know and I will look into upstream and if needed, update this driver for you.