'Some programs will install themselves in the default 64 bit program folder but be infact 32 bit. Win7 will detect this and a pop up screen will say that this program is probably not installed correctly. In these cases it is good advice to click the option to install properly.'

If as you say 32 bit program are being installed in the 64 folder then the installer or the person downloading is at fault?

This never happened to me.

My personal experience with fsx and installing additional programs for addons is that the 64 bit win 7 does not install the correct program. If you go to the program producers website and manually select the 32 bit version and download the installer, it installs correctly, therefore your statement of 32 bit installing in 64 bit only is suspect.

30 years of having been trained on and off by IBM, Sperry Unisys and Control Data for their systems.
I now help to keep people alive, but I'm still in software/hardware.
Is that good enough?

If you had bothered to look at what I've said in the past you would have seen that I stated that I had fsx installed and running perfectly in program files X86.
I've only had fsx running ok outside of this for just a couple of months, previous 10 months or so it worked fine in in X86 but I had also taken ownership of the folders.