For more info and links, check out http://www.soompi.com/forums/index.php?showtopic=128172
Sadly, these are the only links that are still alive because Mediafire and Divshare deleted the files. If you want the other episodes, only the LQs are available, but you can only find them by clicking the link above.
HQ Links:
Episode 18 (070811)
Episode 20 (070825)
LQ Links: Starts from episode 12.
Episode 12 (070630)
Episode 19 (070818)
Episode 20 (070825)
Episode 21 (070901)
Episode 22 (070908)
***Please report dead links if you encounter any by via posting a comment here or PM at soompi. Thanks!***