Installing 32 bit PS on a 64 bit machine

[W.T. Jones]

I am setting up a new machine, windows 7 64 bit. I am trying to conserve space on my boot drive, it is a smallish SSD. Is there any reason to install the 32 bit version of Photoshop? I do not have any 32 bit plugins left that I use. Which would be the only reason I see for installing it.

[Eric Myrvaagnes]

I've been running Win 7 64 for two and a half years now and I've never had any reason to open the 32-bit Photoshop.
In fact, I just had to check my installed programs to be sure that I had indeed installed it. Yup, it's there, but never used.

I'm not using an SSD for boot, so I installed the 32-bit one anyway when I installed the 64-bit version.

In your situation I'd be tempted to keep a copy of the installation files in case you ever need them, but not on the SSD.