No, Lee. Moving original Photoshop plug-in folders in not a good idea. Also it is not good to use the preferences to point to the old Photoshop plug-in folder: ther would be two gaussian blur, one maybe more optimized than the old version, etc...
The best habit is to create a separate folder, even outside of the plug-in folder, and install your third party plug-ins in there (or moving them there in this case *) that way, when a new version of Photoshop comes out, you just point Photoshop to that folder, using edit>preferences >plug-ins and scratch disk.
When I was a pluginaholic, Iused to have several plug-ins folders: useful to load only certain plug-ins, for faster loading, etc.
*some plug-ins have to be installed (they add entries in the registry, install other files, so you may not be able to just drag the .8Bf file to the new folder