"On the topic of Program Files (x86), I just discovered that the x86 folder is for 32bit programs.  I installed Poser Pro into the x86 folder and have been using the program for all most a year.  Now I am wondering if I am running Poser Pro as 32 bit or 64 bit.  How would I know? "

A year ago there was no Poser Pro 2010. But if you mean the other Poser Pro, that was a 32 bit app and has to be in the x86 folder. Only the renderer was 64bit. You ran Poser Pro on 32 bit and if you rendered the 64 bit renderer was used when you are working on a 64bit OS.  You can check that with your Task Manager, it's either FFrender.exe (32bit on a 32 bit OS) or FFRender64.exe (64bit on a 64 bit OS)