Fairly simple job.
Bare with me, it has been a while since I did it.
Firstly, remove the belt by releasing the tension from the tensioner. Make sure you make not of how the belt loops around everything.
Disconnect the negative terminal on the battery.
Then it should be a matter of undoing a few bolts, disconnect the regulator f (2 bolts or a push in clip, can't remember) and the positive terminal.
Install the new one by doing this backwards.