When I installed the downloaded Photoshop CS6 software, the application offered to install BOTH 64bit AND 32bit versions.
Never seen that before, usually software looks at system and installs the correct version (or you choose before downloading).
I have Windows 7 64bit system.
Is there a reason to install BOTH? Is there a problem to have both installed?
PS CS 6 on 64 bit machnie offers you both the options 32 bit as well as 64 bit.
Its your choice to install both or any one of it.
64 bit Photoshop can utilize more RAM installed on your machine and will respond better to larger files as compared to 32 bit
On 32 bit OS , there is no choice given because the only option left out is 32 bit photoshop.
If you install both the versions, there will be "NO PROBLEM AT ALL"