From what new i gather from the smarter folk than me, the install link is just a place holder for when it is released because it has heavy dependancies on other steam products ie hl2 gcfs. Although i think they prolly found it amusing to put the link in even though they delayed release...
The pics you have seen are of people trying to appear import on lesser board where they might just get away with it none of them for example include a game file listing. because they know they couldnt possibly guess all the files ep2 will use... one tried and failed.. city 18? wtf lol
Besides who wants to play a game before its even ready..itll only ruin your fun.
seth also said that the episode 2 shared gcf. was on steam already. Fail. O_O episode 2 will be a big income release for valve, they wouldn't be so careless as they were before with half life 2's beta. atm the only thing there is teh base engine for episode 2, aka. particle benchmark, the one on steam is just newer, and people are confusing it for full episode 2. which is unpossible... oh geez... i misdispronounciated a word...