I made a series of posts several months ago on another board detailing many of my "tweaks" for increasing Zango installs. I think these may be helpful to those asking questions here.
I don't know the protocol here on V7n as far as posting links to other webmaster boards, but since I think this will help I'll go ahead and do it.
*MODERATORS*, if this breaks protocol please delete my post and accept my apologies.
Tweak Zango Syndication Like This And Increase Installs/Revenue
Tweak ZANGO Gateway with this code and increase installs/revenue