How do I remove alternator?

As above, bought second hand alternator off Drew a while ago, gonna giv it a good clean and lick of chrome paint to match TMIC, is it a difficult job to remove and replace, looking at it, looks like you just release tensioner and couple of bolts? Is it worth replacing belt while its off? Is there a specific tool needed for tension setting?
Please excuse my ignorance, as car running perfect and don't want to fook anything up?
Cheers

Disconnect the battery terminal firstly, before doing anything else.

Its fairly straight froward to remove alternator if you have a basic set of tools.

Inspect the belt for cracking and perishment, if it's fairly new then leave it on, if not been changed for awhile i would personally replace it for the cost involved.