Postgre SQL CMS Installation haywire

64 bit and 32 bit are in my "ready to install" tab in DIM.
If I install one of them, the other appears as "ready to install".
Weird. Anyway, I'm on Windows 8 64 bit. Do I need the 32 bit version AT ALL or can I just hide it in DIM?
Comments
You can hide it -- only one can be installed at a time, so if you install another the first one gets uninstalled.