Here you are. A quick summary of what's what and where and how.
1st q: Bring 40 Runecloth, 6 Arcanite Bars, 10 Sungrass, 5 Dark Runes,
and 150 Gold to Lady Liadrin in Silvermoon City. (have all but Runes,
Arcanite Bars and Money)
2nd q: Lady Liadrin in Silvermoon City wants you to destroy 3 Scourge Meat Wagons and kill 15 Scourge Siege Engineers.
3rd q: Lady Liadrin in Silvermoon City wants you to bring her a vial of Tyr's Hand Holy Water.
4th q: Lady Liadrin in Silvermoon City wants you to bring her 1 Arcane
Catalyst, 1 Crepuscular Powder, 1 Azerothian Diamond, and 1 Pristine
Black Diamond.
5th Q: (bored now) Use the Extinguishing Mixture near the eternal flame in the Alonsus
Chapel to remove the Light's protection. Be prepared to fight anyone
who may attempt to defend the chapel.
DONE!