I have cooked this dish a couple of times already...so kind of memorised the technique by heart....
Here are two websites which is useful with tips and recipe.
http://steamykitchen.com/5068-hainanese-chicken-rice.html (over here you will learn to massage your chicken to remove the....ewie things....)
http://www.malaysianfood.net/recipes/recipehainanchicken.htm
As for the chilli sauce, you could use the bottle ones or simply make it with chilli, garlic, ginger all blended and with a touch of lime/lemon juice.
http://kuali.com/recipes/viewrecipe.asp?r=1769
Fried bean sprout - just blanch the bean sprout in boiling hot water, remove to the plate, mix with some soy sauce, cut chilli and spring onion and yes....sesame oil..voila....
http://rasamalaysia.com/ipoh-bean-sprout-chicken/