The first time I attempted it I didn't. The old one came out fine with a bit of force but everytime I tried to get the new one in it kept popping out as I tried to get the selector to line up with the part at the end gearstick. Cut hands and everything. In the end I had to limp it over to my father's garage with only 3rd gear avaliable and got one of the technicians to do it.
To make matters worst I had to take it out again because technician hadn't connected the spring properly so the stick wasn't self centering anymore. I got my mate to help me out this time but in doing so bent the selector bracket by being too forceful so I had to bend it back using molegrips.
I had an absolute nightmare mate, it's one of those jobs I wish I never attempted! Especially as it made zero difference