Info 2 [Q] Glance on Lumia 520

Hello,
can I know the method to install glance screen on my Lumia 520......I have seen many people posting that they got glance on lumia 520.
I have the lumia black update currently an my phone is Dev Unlocked.
Also,is there a way to get 3 column live tiles in L520 similar to what is there in L1520??
Thanks a lot..My first post here