You're best off getting a Haynes manual. There are a loads of screws that hold it on. Some are easily accessible but others require the dismantling of other parts to get to, such as the scuttle panel assembly and centre console.
It's not a particularly hard job, just time consuming.
I've been present when a couple of guys took one out from a corsa. It will often be the small things that will consume the time. Like CD player or a bolt that you cant remove or something! Really annoying.
May have to remove steering wheel too, i can't remember if they removed it because they needed to or just for fun.