No it doesn't need to be boiled at all.
The best way to do it would be to add 1 tablet for every 20 gallons of water you are going to use in a vented container the night before you brew. Make sure you crush the tablet up so it dissolves better.
That's it. It's super easy and simple.
You can also put it in you beer before fermentation finishes to halt the yeast too if you for some reason don't want it to attenuate fully.
Primary: Cascadian APA (BBR/BYO Experiment)
Kegged: American Nut Brown Ale, Dusseldorf Alt
Bottled: Blonde Ale
Next Up: Belgian Golden?, Coconut Porter, Saison, Some kind of fruit beer, more delicious Stout, more IPA, more Blonde Ale, more Stout, Cascadian APA