Hi. Yes, you need to root your tablet. The procedure is pretty straightforward and it can be found in the forum.
I’m using Link2SD. Once an app is installed, you can use it to move the data to the sd card (it’s automated). For example, with Modern Combat 5, a 900 mb app, 822 mb are stored on the sd card.
I’m using a slow sd card (max 7-8 mb/s read speed), so loading times are affected. I don’t know what is the fastest reading speed supported by the tablet.